——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.
A.may | B.must | C.should | D.could |
推荐套卷
——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.
A.may | B.must | C.should | D.could |