15．----Ken, , but your TV is going too loud.
-----Oh, I’m sorry. I’ll turn it down right now.
| A．I’d like to talk with you | B．I’m really tired of this |
| C．I hate to say this | D．I need your help |
.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 |
Carbon dioxide ___ from burning fuels is the most common of the so-called greenhouse gases.
| A．producing | B．having been produced |
| C．to be produced | D．produced |