What he said at the meeting made Mary rather embarrassed, so he felt that he ______ differently.
#63617
A
might express
B
should express
C
could have expressed
D
must have expressed
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I’m sorry, Bill. I _________ the book to you last week, but I was so busy that I forgot to do so.
#63435
A
must have returned
B
could return
C
should have returned
D
might return
----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