Explanation

The comparative forms "faster" and "more comfortable" describe the improvement in speed and comfort of trains.

This usage aligns with correct grammar and context.

Explanation

Ten year ago, I had worked in Lahore.

دس سال پہلے میں نے لاہور میں کام کیا تھا۔

The past perfect tense "had worked" is used here to indicate an action that was completed before another point in time, in this case, ten years ago.

Explanation

We are not in a position to do all we promised to do.

ہم اس پوزیشن میں نہیں ہیں کہ وہ سب کچھ کر سکیں جس کا ہم نے وعدہ کیا تھا۔

In this sentence, "all" is the most appropriate option because it refers to the entirety of what was promised.

It is concise and grammatically correct in this context.

Explanation

Comets revolve around the Sun in elliptical orbits.

Their motion is influenced by the Sun's gravitational pull.

Explanation

• Smoking is injurious to health.
• تمباکوشی مضر صحت ہے
• Injurious to means harmful or damaging to something.
• We use “to” because injurious is normally followed by the preposition “to” when we say what is harmed.

Rule:

• Injurious + to + something/someone

Explanation

I agree with you in this matter.

Agree with someone means کسی سے اتفاق کرنا

Explanation

The phrase "It takes two to make a quarrel" is a common expression.

"To" correctly connects "takes two" with "make a quarrel."

Explanation

"Done" is the correct choice.

As it is the past participle used with "can" to indicate possibility or ability in passive voice.

Explanation

The present continuous tense "are walking" is correct.

Because it describes an ongoing action happening at the moment.

Explanation

The present perfect tense "has posted" is correct.

Because it indicates a completed action with relevance to the present.