Which sentence correctly uses a modal to express a past ...

★ Modal Probability

Which sentence correctly uses a modal to express a past probability?

A. She must be tired after the long journey.

B. He might have forgotten the meeting.

C. They can’t be at the office now.

D. You should finish your homework.

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

A. She might be at the gym.

B. He must be the new teacher.

C. They can’t be serious.

D. You should call her.