English Grammar: Sentence Improvement

'Had better' is the correct idiomatic expression used to give strong advice or warnings. The structure is 'had better + base verb' (without to). 'Should better' and 'could better' are not standard English idioms. The sentence is giving advice about revising the essay.

The sentence uses 'If it were possible' (past subjunctive for hypothetical), so we need the past continuous form 'was taking' to match the hypothetical timeframe. 'Takes' is present simple, 'is taking' is present continuous - both don't match the hypothetical past context of the sentence.

'Could not help laughing' is a standard English idiom meaning 'could not stop myself from laughing.' The structure is 'could not help + -ing form'. Adding 'to' (as in options A and C) changes the meaning and is grammatically incorrect. The original sentence is correct.

'Makes up a story' is the correct phrasal verb meaning to invent or fabricate a story. 'Makes for' means contributes to, 'makes out' means to understand or claim. 'Makes up' is the only option that conveys the meaning of fabricating an excuse, which fits the context of someone in trouble.

'Call into question' is the correct idiom meaning to doubt or challenge something. 'In question' (as in 'under review') doesn't fit the context. 'Out of question' means impossible, and 'under question' is not the standard expression. 'Call into question' best expresses challenging the validity of his statement.

'Run through money' is the correct idiom meaning to spend or consume money quickly. 'Run into' means to encounter or collide with, 'ran down' means to decrease or criticize. 'Run through' conveys the rapid consumption of money mentioned in the sentence.

The sentence uses the construction 'It is time for you + to + infinitive' which is the standard structure. The base form 'start' is grammatically incorrect. 'Started' is past tense, 'would start' adds unnecessary modal. 'To start' completes the idiomatic expression properly.

The verb 'evade' is followed by a gerund (-ing form), not an infinitive with 'to'. Correct usage is 'evade paying'. 'Evade from paying' and 'evade against paying' are incorrect - 'evade' doesn't take these prepositions. The gerund form 'paying' is grammatically correct.

The sentence has two events in the past: reaching the village and the sun setting. Since the sun set BEFORE they reached the village, we use the past perfect 'had set' to show the earlier action. Simple past 'set' doesn't establish the sequence correctly. The modal forms don't fit.

When taking an oath or pledge, we use the phrasal verb 'swear by' something, meaning to pledge or promise by its authority. 'Swear on' is incorrect in this formal context. Therefore, 'swear by the Constitution' is the grammatically correct expression.

The verb 'demands' is followed by 'that' and requires the subjunctive mood, which uses the base form of the verb without 'should' or 'does'. The original sentence 'demands that Lathigara acquire' correctly uses this subjunctive construction in formal English, so no improvement is needed.

When using abstract nouns like 'life' and 'time' in a general, philosophical sense, we typically omit articles. 'In a life and time' sounds like a specific instance, while 'in life and time' conveys the universal, abstract meaning the poet intends. This creates a more natural and poetic expression.

When describing an artist working with their materials, we use 'with' to indicate the instrument or medium being used. 'Work the medium' sounds like manipulating the medium itself, while 'work with the medium' correctly indicates using the medium as a tool for creation. This is the standard prepositional usage in artistic contexts.

The passive construction 'impossible to be heard' is awkward and grammatically problematic. The active construction 'it was impossible to hear his speech' is much more natural and grammatically correct. This structure clearly places the impossibility on the act of hearing, which is what the sentence intends to convey.

The verb 'trace' is followed by the preposition 'to' when indicating the source or origin of something. 'Reason' is more appropriate than 'cause' in this context because we're talking about tracing the origin of the urge for nationhood, not assigning a cause. Therefore, 'to any one reason' is the best improvement.

When 'demonstrate' is used to show someone's characteristic or quality, it's followed directly by a noun clause without 'that'. The clause 'how unreliable he is' correctly functions as the noun clause. The 'that' in the original sentence is grammatically redundant and incorrect. Therefore, 'how unreliable he is' is the correct improvement.

When an action began in the past and continues up to the present, we use the present perfect continuous tense. 'Have been living' correctly shows this ongoing action from 1978 to now. The simple present 'am living' only shows current action without the duration, which doesn't fit the context of 'since 1978'.

When talking about possession or ownership, we use the simple present tense 'have', not the present continuous 'are having'. 'Are having' implies a temporary event or experience, which doesn't make sense for possessing houses. 'Have' correctly indicates a permanent state of ownership.

When expressing purpose in a more formal or complete way, 'in order to' is the correct construction. 'Not to miss' as an infinitive of purpose is less formal and can be ambiguous. 'In order not to miss' clearly and grammatically expresses the negative purpose of arriving early. This is the standard formal construction for negative purpose.

The adjective 'enthusiastic' is correctly followed by the preposition 'about' when expressing excitement or interest in something. 'Enthusiastic about' is the standard and correct prepositional usage. 'Enthusiastic with', 'in', or 'on' are all incorrect and non-standard. Therefore, no improvement is needed.

The verb 'deny' is transitive and requires a direct object - you must deny something. In this context, 'she denied' is grammatically incomplete. While 'she denied to go' is grammatically possible, 'she refused' is the best improvement because it clearly communicates the rejection of the request without requiring an object and matches the context perfectly.

The past perfect continuous 'had been waiting' is correct because the waiting started before and continued up to the past moment when he got off the train. 'Was waiting' (simple past) doesn't capture that the waiting had been ongoing for a long time before the train arrived. 'Has waited' would mean the waiting is still relevant now, which doesn't fit the context.

'Insisted on going' is correct because the verb 'insist' takes the preposition 'on' followed by a gerund (-ing form). 'Insisted to go' incorrectly uses the infinitive after 'insist'. 'Insisted going' lacks the necessary preposition 'on'. 'Insisted for going' uses the wrong preposition.

'Shedding' is correct because the phrase 'couldn't help' is always followed by a gerund (-ing form). The structure 'couldn't help + gerund' means 'unable to prevent or avoid'. 'Shed' is the bare infinitive and is grammatically incorrect here. 'In shedding' doesn't fit the idiomatic structure.

'Have studied' is correct because it links the lifelong experience to the present moment when the speaker says 'I know he's a cheat'. Present perfect tense shows action continuing from past to present. 'Studied' (simple past) would imply the studying is completely finished and disconnected from the present knowledge, which doesn't fit the context.