Question

Fill in the blank with the most appropriate word.
He is getting fatter and fatter. He ___________ eating too much.
a) Must be
b) Can be
c) May
d) Might

Answer 1

Hint: The sentence refers to a person who is gaining weight and usually this happened when one is not eating a correct diet. Hence, in the sentence, we have to connect the person (who is getting fight) with the phrase eating too much (which indicates his eating habits).

Complete answer:
Before trying to find a solution for the above-given question let us try to understand the options that are given and how and where these options can be used.
Option (a) – must be: the phrase ‘must be’ is used to indicate a deduction of what will follow as per the consequence of an action or activity. For example, he is ill it must be due to the food he ate.
Option (b) – can be: the phrase ‘can be’ is used to imply an ability or permission regarding something, for example, this can be done by him.
Option (c) – may: the word ‘may’ is used to indicate possibility or permission regarding something. For example: may I go to the washroom.
Option (d) – might: the word ‘might’ indicates a slight possibility. For example: he might come tomorrow.
As we have to connect the phrase so that the deduction that ‘he’ is gaining weight because of his eating habits is understood. So as per the explanation, the correct solution would be option (a), i.e. must be. Hence, the sentence is – ‘He is getting fatter and fatter. He must be eating too much’.

Note:
 We have to establish his eating habits as the reason for his weight gain. As he is gaining weight because he is eating too much, so may and might represent possibility hence they are not plausible explanations.