Question

Fill in the blank with most appropriate word-
The children had great fun ________ fireworks.
a) Letting out
b) Letting in
c) Letting down
d) Letting off

Answer 1

Hint: Read the given phrase/sentence carefully. Try to make out the meaning of it and find the subject or the predicate or the main object of the sentence.

Complete answer:
 The given sentence conveys that the children enjoyed a lot while they played with the fireworks. There are four options with changed determiners. These are also known as compound words – words that work/function together.
Now, let us examine all the given options to find out the correct option-
Option ‘a’ is Letting out. It is a phrasal verb. If something or someone lets water, air, or breath out, they allow it to flow out or escape. For example It lets sunlight in but doesn't let heat out.
Option ‘b’ is Letting in. It is a phrasal verb. It means a process of shortening and widening pelts by cutting in strips and stitching.
Option ‘c' is Letting down. It is a phrasal verb which means to fail to support or help someone as they have hoped or expected.
Option ‘d’ is Letting off. It is a phrasal verb which means to punish lightly; or to cause a gun, firework, or bomb to explode.
Hence, option ‘d’ is the correct option. The complete sentence would be – The children had great fun letting off fireworks.

Note:
All the other options are plausible distractions. The phrasal verbs are made out of the main word ‘let'. Only the usage of prepositions change.