Spotting Errors

There is a subject-verb agreement error. 'His assistant' is singular, so it requires the singular verb 'has'. Additionally, the sentence needs 'has done' to properly parallel 'are still doing'.

The subject of the sentence is 'The whole block', which is singular. Phrases like 'including two shops' do not change the number of the subject, so the verb should be 'was' instead of 'were'.

The word 'to' is a preposition, and its objects must be in the objective case. While 'you' remains the same, 'I' (subjective) must be changed to 'me' (objective).

Abstract nouns like 'justice' are generally used without the definite article 'the' when they refer to the concept in a general sense. It should be 'practices justice'.

The phrase 'The sum and substance' is a compound subject that refers to a single idea (the essence). In English, such pairs take a singular verb, so 'is' is correct.

When a sentence specifies a particular point in past time (like 'in 1990'), the simple past tense ('passed') must be used instead of the present perfect ('have passed').

The comparative structure 'as much' requires a second 'as' to complete the comparison ('as much as'). The full correct phrase is 'as much as or even more than'.

The sentence requires parallel structure when comparing two activities. Since 'reading' is a gerund, the second activity should also be a gerund ('playing') rather than an infinitive ('to play').

 Since 'team" is a collective noun, the pronoun should be "its".

The sentence is grammatically sound, utilizing correct parallel structure and phrasing for preference.

The sentence expresses a general condition or fact, so the indicative mood 'is' should be used instead of the archaic or misplaced subjunctive 'be'.

In the idiomatic expression for time, we usually say 'quarter to ten' or 'a quarter past ten'. However, many style guides and exams consider the 'a' redundant or incorrect in the 'quarter to' construction.

The correlative conjunction 'either... or' requires parallel structure. To be balanced, it should be 'to either comprehend or solve' or 'either to comprehend or to solve'. The placement of 'either' in part B makes it unbalanced.

Case of prepositional usage. 'Shout on' is incorrect usage, and should be replaced with 'shout at', which means 'at the highest intensity of one's voice'.

Case of redundancy. Verb 'voilate' itself means 'going against the laid rules'. So, preposition 'against' is redundant here.