Complete the sentence with the appropriate modal: If she didn't ...

★ Modal Probability

Complete the sentence with the appropriate modal: “If she didn’t answer the phone, she ______ have been busy.”

A. must

B. might

C. can’t

D. should

Preview next quiz:

Which of the following sentences uses a modal to express a high probability in the present?

A. She might be at the library.

B. He must be the new manager.

C. They can’t be serious.

D. You should call her.