I'm sorry but I can't meet you later tonight. I ...

★ Modals: Possibility, Necessity, Expectation

I’m sorry but I can’t meet you later tonight. I ________ watch a video for class.

A. must

B. have got

C. have to

D. could

Preview next quiz:

I am so happy because we ______ wake up early tomorrow. It is S period!!

A. don’t have to

B. must not

C. can’t

D. supposed to