1. --- Are you in a hurry?

   --- No, in fact I’ve got plenty of time. I _____ wait.

   A. must         B. need         C. may      D. should

2. --- Someone is knocking at the door. _____ it be Venis?

   --- No, it _____ be her; she left for New York this morning.

   A. Can; mustn’t            B. Might; can’t  

   C. May; doesn’t            D. Can; can’t

3. He didn’t agree with me at first, but I _____ persuade him to sign the agreement later.

   A. could         B. might       C. should        D. was able to