Explanation

"In" is used for months, years, and seasons — in the spring is the correct seasonal usage.

"On" is used for specific days/dates.

Explanation

"On" is the correct preposition used with days of the week.

It shows the exact day something will happen.

Explanation

"Some" is used with uncountable nouns like "coffee" when making polite offers or requests.

"Can you please give me some coffee?" is grammatically and contextually correct.

Explanation

The sentence starts with "After he had researched," which is past perfect tense. The correct structure to follow is:

"had + past participle" → "had researched and written".

Explanation

We generally use in before evening, morning, afternoon etc. 

In is the preposition here. 

We get up early in the morning ہم صبح جلدی اٹھتے ہیں

Explanation

The correct preposition is "on" because the spider is attached to the surface of the ceiling.

"On the ceiling" means something is resting or moving along its surface.

Explanation

Most people care about other people`s opinions.

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Care About is a phrase which means پرواہ کرنا یا خیال کرنا

If you care about something, you feel that it is important and are concerned about it.

"care about" is the best option according to the question

Explanation

"For" indicates purpose or reason.

The phrase "for your safety" means to ensure you stay safe.

Explanation

Correct sentence: "…so that he can go on a month long tour of Europe."

"On" is used with journeys or tours.

Explanation

"For a while" indicates a duration of time (how long the action continued).

Example: "I have been ringing the doorbell for a while."

"For" + time period = Duration (e.g., for hours, for days).

"Since" + specific time = Start point (e.g., since morning).