At the beginning of the class, the noise of doors__________ could be heard many times.
A.opened and closed |
B.to be opened and closed |
C.being opened and closed |
D.to open and close |
推荐套卷
At the beginning of the class, the noise of doors__________ could be heard many times.
A.opened and closed |
B.to be opened and closed |
C.being opened and closed |
D.to open and close |