E. Choose a, b or c.
1. I__ log in to the program because I didn't have the right username or password.
a. can't
b. wasn't able to
c. might not
2. A: What are you doing this afternoon?
B: Well, I___play hockey, but I'm not sure yet.
a. might
b. must
c. mustn't
3. A: Will you
contact Heather?
B: Yes, I've got her e-mail address.
a. be able to
b. can
C. could
4. A: Does Mike have trainers?
B: He____have trainers. He goes jogging every weekend.
a. can't
b. could
C. must
5. That___be Debbie's jacket.Hers is black.
a. can't
b. mustn't
C. can
6. Troy___play the piano, so he can write the songs for the band.
a. may
b. is able to
C. will be able to​