D. Complete the sentences with must not or cannot.

1.How can you say such a thing? You __ be serious.

2.Ben is a good friend of Shine, but he hasn’t come during her

birthday.

He ____have known the address.

3.Their car is not on the garage. They ____be home yet.

4.You haven’t started your assignment. You____ answered

everything in just 10 minutes.

5.I just bought cereals this morning. The jar ____be empty

just now.​