Explanation

Explanation

The correct preposition is “in examinations”, not “on examinations.”

Corrected sentence: “Sometimes students fail to score well in examinations, because they are very nervous.”

Explanation

In “Neither Shazia nor her friends…,” the subject nearer the verb is friends (plural).

Hence the verb must be plural → were able instead of was able.

Explanation

The subject is Saima (female), so the pronoun should be her, not his.

Correct sentence: Neither Saima nor her friends were able to attend the theory class this morning.

Explanation

The correct idiom is “turn a deaf ear to”, not “on.”

Correct sentence: He turned a deaf ear to your request.

Explanation

The word "good" is an adjective, but it should be an adverb to describe how it absorbs gases.

The correct word should be "well."

Explanation

"Laid" means put/placed something, but here the subject is resting.

The correct verb is "lay" → He lay there for some time.

Explanation

After “It is essential that”, the verb should be in the subjunctive mood (base form).

Correct sentence: It is essential that nitrogen be present in the soil for plants to grow.

Explanation

The subject is singular (One of the primary causes), so cause → causes.

Correct sentence: One of the primary causes of the accidents in coal mines is the accumulation of gas.

Explanation

The error is in parallelism: “digestive systems” and “respiratory systems” are nouns, so the third item should also be a noun phrase, not a verb.

Corrected sentence:

"Both plants and animals have digestive systems, respiratory systems, and reproductive systems."