The little boy was allowed to go to have a swim _____ he finished his homework.
| A．in case | B．provided that |
| C．now that | D．by the time |
We hurried to the station, ________ the train was gone.
| A．to find | B．finding | C．found | D．only to find |
.Operation rooms should be kept free ______ bacteria of any kind.
| A．with | B．for | C．from | D．to |
.The League Secretary and monitor ______giving a speech while the rest of the class ________ listening attentively.
| A．were, were | B．was, was | C．were, was | D．was, were |
Mr. Wang is a man of _________ and we have got much _________ from him about how to make a living.
| A．experience; experiences | B．an experience; an experience |
| C．experiences; experience | D．experiences; experiences |
Don’t forget to bring a dictionary next class.
___. I didn’t catch what you said.
| A．Never mind | B．I beg your pardon |
| C．That’s right | D．I’m not sure |