---How did you do in the test yesterday? -----Not so well. I ______ much better but I misread the directions for writing.   
#63231
A
will have done
B
could have done
C
must have done
D
may have done
推荐题目
----May we leave the classroom now?----No, you         . You           to leave until the bell rings.
#75525
A
mustn’t; are allowed
B
can’t; aren’t allowed
C
don’t have to; are allowed
D
needn’t; aren’t allowed
 If you _____ smoke, please go outside.
#74387
A
can
B
may
C
must
D
might
Tom, you ________ leave all your clothes on the floor like this next time. 
#63404
A
mustn’t
B
wouldn’t
C
needn’t
D
may not