.At the beginning of class, the noise of desks ____ could be heard outside the classroom.
| A．opened and closed | B．to be opened and closed |
| C．being opened and closed | D．to open and close |
相关试题
I _____ an old friend of mine while I was in London.
| A．came across | B．came up | C．came out | D．came about |
The well was found __________ when we got there.
| A．digging | B．to be dug |
| C．to dig | D．being dug |
I am going to the post office. Do you have any letter _________?
| A．to be sent | B．to send | C．sending | D．sent |
It was at this shop _______ I bought my skirt. How about coming to my home to have a look tonight?
| A．that | B．where | C．which | D．what |
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