Explanation

The subject “Our clean environment” is singular, so we need the singular form of the verb.

The verb “reflects” is the correct singular form of “reflect” in the present simple tense.

Explanation

This is a sentence of Present Indefinite Tense.

We use first form (come) in simple sentences of Present Simple Tense.

They always Come back home late. 

Explanation

This sentence uses the second conditional ("If I had time..."), which refers to an unreal present or future.

The correct structure is: If + past simple, would + base verb → If I had time, I would learn to play the guitar.

Explanation

The phrase "has interviewed" is in the present perfect tense, which matches with "so far" (an unfinished time).

So far means اب تک

Explanation

The train had gone before the passengers came.

This sentence uses the past perfect tense ("had gone") to show an action completed before another past action.

"Had" is the correct auxiliary verb for forming the past perfect.

Explanation

 That was the worst movie I have ever seen.

"Worst" is the superlative form of "bad" and is used to describe something that is the worst out of a group or over time.

The phrase "I have ever seen" indicates a comparison over all time, which requires a superlative form.

Explanation

"Flock" is the correct collective noun for sheep (also birds).

"A flock of sheep" is a commonly used and grammatically correct phrase.

Explanation

"Lying" is the present participle of "lie" (to recline), used here as a continuous action.

The sentence describes people reclining on the sofa while watching TV, so "Lying" fits grammatically.

Explanation

The sentence is a second conditional (imaginary/unreal situation in the present), using "if + past tense" and "would + base verb".

Since it says "if the weather were good", the correct structure is: "We would play football."

Explanation

The phrase "by means of" means "with the help of" or "using", which fits the sentence perfectly.

The sentence becomes: "The work was done by means of the help of volunteers."