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The sentence has a typo - 'learned' should match the context. The past perfect 'had learnt' (or learned) is needed because 'was moved' is past tense, and the learning happened before that moment.

Both 'had lived' and 'had been living' are grammatically correct. 'Had lived' emphasizes the completed action, while 'had been living' emphasizes the continuous nature. Since both work in context, 'both 1 and 2' is the correct answer.

Present perfect 'have been' is correct because 'recently' indicates a connection to the present, and 'changes' is plural requiring 'have' not 'has'. The present perfect tense shows changes that happened in the recent past with present relevance.

Present perfect continuous 'has been sleeping' is correct because it describes an action that started in the past and continues up to the present moment. The continuous form emphasizes the ongoing nature of the sleep.

Present perfect 'have written' is correct with 'This is the only novel' because it describes a life experience up to the present moment. The present perfect tense connects the past action to the speaker's current experience.

Present perfect 'have had' is correct because the sentence expresses experience up to the present moment. The structure 'have ever had' is used to talk about experiences at any time in one's life up to now.

Simple past 'went' is correct because 'a few hours ago' is a specific completed past time expression. Present perfect forms cannot be used with specific past time markers.

Future simple 'won't' (will not) is correct because the first conditional 'unless you take the brake off' sets up a real future possibility. 'Won't move' expresses the future consequence in this conditional structure.

Present simple tense is used for habitual or repeated actions. 'Whenever it rains' indicates a recurring condition, so we use present simple 'leaks' to show what happens each time it rains. Option D 'could leaks' is grammatically incorrect - modal verbs are followed by the base form, not 's' form.

Present perfect tense connects past to present. 'Since then' marks the starting point of an action that continues to or has relevance in the present, so 'have changed' is correct with 'I'. Option B 'has changed' would be correct for 'he/she/it', not 'I'.

Present perfect tense is used with 'just' for recently completed actions. 'She has just gone out' indicates an action that happened very recently. Option A incorrectly uses 'have' with singular 'she'. Options C and D use wrong tenses for 'just'.

In reported speech, present tense often shifts to past tense. The original direct speech was 'I am living in Ireland,' which becomes 'he was living' in reported speech. Past continuous 'was living' correctly shows an ongoing past action.

In past simple questions with 'Did,' we use the base form of the verb. The structure is 'Did + subject + base verb,' so 'Did come' is correct. 'Came' is incorrect because it repeats the past tense marker.

Past perfect tense shows an action completed before another past action. Raju's service in the navy ('had served') happened before he retired and married, so we use past perfect to show the correct time sequence. Options A and B use wrong tenses.

In negative past tense with 'didn't,' we use the base form of the verb. 'Didn't go off' is correct. 'Went' is wrong because it's the past form and 'didn't' already marks the past tense. Options C and D use wrong verb forms.