The task is to choose the correct verb or adjective to complete each sentence, considering the context and grammatical rules.
The phrase 'last year' indicates a past action. Therefore, the past tense of 'sing' is needed. 'Sang' is the past tense, and 'sings' is the present tense.
Correct option: a sang
The sentence structure 'the ... student' requires a superlative adjective. 'Better' is comparative, and 'best' is superlative.
Correct option: b best
The phrase 'last night' indicates a past action. 'Wrote' is the past tense of 'write', and 'write' is the present tense.
Correct option: a wrote
After the auxiliary verb 'did n't', the base form of the verb is used. 'Went' is past tense, and 'go' is the base form.
Correct option: b go
The sentence structure 'the ... girl' requires a superlative adjective. 'Pretty' is positive, and 'prettiest' is superlative.
Correct option: b prettiest
After the auxiliary verb 'Did', the base form of the verb is used. 'Win' is the base form, and 'won' is the past tense.
Correct option: a win
The sentence uses 'very' followed by a blank and then the noun 'swimmer'. The superlative form of 'fast' is 'fastest', and 'fast' is the positive form. Since it's describing Ron's ability in a general sense, the superlative 'fastest' is appropriate in this context, implying he is the fastest among others.
Correct option: a fastest
The structure '... than' indicates a comparison, requiring a comparative adjective. 'Shyer' is the comparative form of 'shy', and 'shyest' is the superlative form.
Correct option: a shyer
The phrase 'an hour ago' indicates a past action. 'Bought' is the past tense of 'buy', and 'buy' is the present tense.
Correct option: a bought
The context implies a completed action of meeting someone. 'Met' is the past tense of 'meet', and 'meet' is the present tense.
Correct option: a met
Answer: 1 a, 2 b, 3 a, 4 b, 5 b, 6 a, 7 a, 8 a, 9 a, 10 a