Fill in the Blanks

 Accents are acquired, so option 3 is correct.

John is already doing this activity, so 'making' is correct. 'To' alone is not used with 'verb+ing'. So, option 3 is correct.

Though can be used after an adjective or an adverb. 'Tired though he was = Although he was tired.' So, option 2 is correct.

 'As' can be used after an adjective or an adverb, so option 4 is correct.

 'But' is used when one clause is on the contrary to the other one. So, option 3 is the correct answer.

 The sentence is in the past tense, so the verb has be be in the past tense. So, option 3 is the correct answer.

Few means not many, so few or fewer is used with children. Fewer is used in comparisons, so option 2 is the correct answer.

'Lain' is the past participle of the word 'lie', so option 2 is the correct answer.

The sentence is in simple present tense, so 'verb+s' is used. So, option 2 is the correct answer.

'Quickly' is an adverb which describes the verb 'goes' and 'noisy' is the adverb which describes the verb 'sounds'. So, option 2 is correct.

 'For which' is used when one event occurs because of another, so in this case, the person is thankful because her aunt gave her a necklace. So, option 4 is correct.

'Should' is used in case of probability, so in this case, option 3 is correct.

'Less' and 'lesser' mean 'not much'. 'Less' is used in comparisons, so option 3 is the correct answer.

 'Laid' is the past participle of 'lay'. As the sentence is in past tense, option 1 is the correct answer.

'Hardly' doesn't follow 'not', so option 1 is correct.