Question

He left home at 9 o’clock. He ________ be here any minute. (a) Should (b) must (c) ought to​

Answer 1

He should be here any minute.

Answer 2

Answer:

(b) must

He left home at 9 o’clock. He must be here any minute.

Explanation:

‘Must’ is a modal verb that is used to express something necessary and very important; to say that something is likely or logical; when we realize that something is certainly true; to express a wish; and for recommendations. For example to tell people a rule or law, we use this modal. An example of the usage of modal ‘must’ is: Vehicles must not be parked in front of the entrance.  

Must can also be used to express highly probability or possibility of something that might happen.