Preposition - Study Mode

[#431] He gave a talk . . . . . . . . the causes of dengue fever.
Correct Answer

(B) on

Explanation

Solution: In this sentence, "on" is the correct preposition to use. "He gave a talk on the causes of dengue fever" means he delivered a speech or presentation about the causes of dengue fever. Using "of" would imply belonging or connection, as in "the causes of dengue fever," which describes what causes dengue fever. However, it does not fit in the context of giving a talk. "For" would suggest purpose or benefit, but it does not fit here because the talk is not intended to benefit the causes of dengue fever. "Off" is incorrect as it generally implies separation or distance and does not make sense in the context of delivering a talk. Therefore, "on" is the appropriate preposition to use when referring to the subject or topic of a talk.

[#432] You can see the doctor . . . . . . . . 8 am and 12 noon.
Correct Answer

(C) between

Explanation

Solution: 'Between' means 'in the period separating two points in time'. Here two points in time are 8 am and 12 noon. Hence 'between' makes the sentence meaningful.

[#433] Nowadays Raktim studies . . . . . . . . the whole day.
Correct Answer

(C) throughout

Explanation

Solution: 'Throughout' means 'in every part of'. Hence it makes the sentence meaningful.

[#434] May I come . . . . . . . .?
Correct Answer

(B) in

Explanation

Solution: 'Come in' means 'to enter a room, building, or other place'. Hence it makes the sentence meaningful.

[#435] My watch is . . . . . . . . the table.
Correct Answer

(C) on

Explanation

Solution: 'On' is used to show that something is in a position above something else and touching it. Here 'watch' is above the 'table' and touching it.