(   ) 3. I want to give up,my teacher always encourages me      harder.

A. However, studying B. Whoever, to study

C. Whatever, study D. Whenever, to study

(   ) 2. ―Bill,you look tired today. What's wrong?

       ―I was    busy   _ I didn't go to bed until midnight yesterday.

A. so,that B. such,that C. too,to D. enough,to

(   ) 1. ―I wonder if he      us in the discussion tonight.

     ―I believe if he      his homework,he will join us.

A,will join, will finish      B. will join,finishes

C. joins, finishes          D. joins,will finish

(   ) 20. —May I put my bike here?

       ―No,you      

A. needn't    B. don' t    C. mustn't    D. won't

(   ) 19. A computer      think for itself. It must be told what to do.

A. can't      B. couldn't      C. may not    D. might not

(   ) 18. —Shall I tell John about it?

       ―No,you       Fve told him already.

A. mustn't B. can't C. needn't D. shouldn't

(   ) 17. John,you       play with the knife. You      hurt yourself.

A. won't,can't      B. mustn't,may

C. shouldn't,must     D. can't,shouldn't

(   ) 16. The fire spread through the hotel very quickly but everyone      get out.

A. had to    B. would      C. could    D. was able to

(   ) 15. ―Will you stay for lunch?

      —Sorry, I       My brother is coming to see me.

A. mustn't B. can't C. needn't D. won't

(   ) 14. ―Are you coming to Jeff's party？

       ―I'm not sure. I      go to the concert instead.

A. must    B. would 

C. should    D. might