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.