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Pa answer 1-15.
1. Remember, you're in a library, you_____speak loudly.
a. don't have b. musn't
c. can't d. shouldn't have
2. Don't forhet to take an umbrella. It_____rain later.
a. might b. can
c. should d. could
3. Betty_____be ill. I've just seen her.
a. can b. can't
c. has to d. could
4. I was using my mobile phone a minute ago. It_____be somewhere here.
a. must b. have to
c. could d. might
5. A man may be __________friendly, yet malicious in heart.
a. apparently b. arguably
c. allegedly d. all in all
6. I will__________call you tommorow.
a. definitely b. obviously
c. exactly d. easily
