Answer: A

Explanation:

• 'Very' is used before a positive degree, e.g., very good, very nice, very lucky.
• 'Much' is used before comparative degree, e.g., much better, much luckier and much wiser. So, replace 'very' with 'much' in the first part of this sentence.

Answer: A

Explanation:

A reflexive pronoun is used when the object and subject of a sentence are same. Each personal pronoun has its own reflexive pronoun, e.g., I: Myself; He: Himself; She: Herself and more. In this sentence, reflexive pronoun is missing in the first part of the sentence. So, add the reflexive pronoun, e.g., Tony introduced himself to the chairman.

Answer: B

Explanation:

A relative pronoun 'that' is used after the words such as 'the same'; 'none'; 'nothing'; 'any'; 'only'; 'the few'; 'all' and the 'little'. So, in this sentence replace 'who' with 'that', e.g., There is none that can help you.

Answer: C

Explanation:

Some adjectives do not show comparison as their meaning is already superlative, e.g., unique, excellent, maximum, perfect, extreme and more. So, replace 'the most' with 'a' in the third part of the sentence, e.g., a unique singer of the film industry.

Answer: B

Explanation:

All the words like a, an, a certain, another, each, every, this, that, either and neither are followed by a singular countable noun. So, add 'a' before the 'certain', e.g., he asked a certain boy to enter the director's office.