Let’s _______ to the opera tonight.

A. go????????? B. to go???? C. going???? D. went

Tony ________ go to the opera on Saturday because he's going to have a meeting.

1. A.
   can't
2. B.
   might
3. C.
   mustn't
4. D.
   should

Tony        go to the opera on Saturday because he is going to have a meeting.

A. can’t                 B. might                       C. mustn’t             D. should