——This wall of air is an effective answer to the problem and it ____ work.——But it is a question to put such a wall of air around the statue.
#89420
A
may
B
must
C
should
D
could
推荐题目
I should very much like to have gone to the party, but ______. 
#87309
A
I'm not invited
B
I won't be among the invited 
C
they won't invite me
D
they didn't invite me
I wish I____ my uncle yesterday.
#87962
A
met
B
have met
C
would met
D
had met
We ________ jump to conclusions before we have all the facts.
#86585
A
couldn't
B
mightn't
C
shouldn't
D
mustn't
 Michael ______ be a policeman, for he is much too short.
#89354
A
needn’t
B
can’t
C
should
D
may