Preposition

Charles Dickens was born_____1812, and died _____1870

• on

• in

• at

My birthday is ______October 28th.

• in

• at

• on

The train leaves ______ 2.30, and arrives ____ Chennai_______6.15

• at, in, at

• in, in, in

• at, at, at

• in, at, in

I will call you _______ Sunday, _______ 3'o clock.

• at, on

• in, at

• on, at

• at. in

The project must be completed______ the end of the week.

• in

• on

• at

I shall be back _____ about tenty minutes' time.

• on

• in

• at

This assignment must be finished _______ next week-end.

• in

• on

• at

• no preposition is needed.

Answer explanation

If the option for this question includes the preposition "by", then that would be the answer. The preposition "by" is used before a time before which the mentioned action must have been completed but should have not been extended after that. Remember! the prepositions, in, on, at are not used if the noun giving a time is preceded by an adjective.

Suman finished the race ____three minutes, thirty five seconds.

• on

• at

• in

Answer explanation

Just thought, time mentioned is specific and so, "at" is the right preposition? You are correct but not here. Remember! "In" is used not just to show relationship with smaller entity but also to show the total length of time taken for the completion of some activity or operation.

My brother married________ my eighteenth birthday.

• at

• on

• in

I will call you ______ tomorrow.

• on

• at

• in

• no preposition is needed.

Answer explanation

Yesterday, today, and tomorrow, besides being nouns, are also used as adverbs, and therefore do not take a preposition. Similarly: yesterday evening, yesterday afternoon, a week ago yesterday, tomorrow morning, a week tomorrow, a fortnight today, all don't take a preposition.

Also, remember! We say last night, yesternight, tonight, (and not yesterday night or today night). But we can say tomorrow night. In the same way, we say this morning, this afternoon, this evening, (not today morning, today afternoon, today night.)

Sorry for long explanation.