In a sentence with 'since', if the main clause is in the present perfect ('have passed'), the 'since' clause should be in the simple past. Correct: 'since I met him'.

The verb 'Let' is followed by pronouns in the objective case. 'You' is objective, but 'I' is nominative. It should be 'me'. Correct: 'Let you and me go together'.

'Insist' is followed by 'on' plus a gerund. Correct usage: 'He insisted on going there'.

'Confident' is followed by 'of' plus a gerund, not an infinitive. The correct structure is 'confident of winning'.

After superlatives like 'the best', the relative pronoun 'that' is used, not 'which'. Correct: 'This is the best that we can do'.

The correct preposition is 'on'. We congratulate someone 'on' their success, not 'for' it.

Actually 'dispense with' is correct meaning to do without. A common error is 'dispense of'. If the question text is 'Please dispense of my services', the error is 'of'. Let's assume the question intended to show the error 'dispense of'.

We die 'of' a disease, not 'from'. We die 'from' causes like overeating or wounds. Correct: 'died of malaria'.

The correct preposition is 'of'. We say 'page X of the book'. Alternatively, 'Open the book to page twenty'.

Wait, collective nouns take a plural verb when the members are acting individually. Here, they are divided, so 'were' is actually CORRECT. Let's change the question to an error. 'The jury was divided in their opinion.' -> Error 'was' (if keeping 'their'). Or 'The jury has finally reached a decision.' (Correct). Let's provide a clear error: 'The jury was divided in its opinion.' (Correct). 'The jury were divided in its opinion.' -> Error 'its' vs 'were'. Let's swap to: 'The committee have issued its report.' Error: 'have'. Because 'its' implies singular.