It is pretty well understood_______controls the flow of carbon dioxide in and out of the atmosphere today．
| A．that | B．when | C．what | D．which |
—Can I help you，sir?
—Yes，I bought this radio here yesterday，but it______.
| A．didn’t work | B． won’t work |
| C．can’t work | D．doesn’t work |
—What do you think of this performance?
—______，I don’t like it very much.
| A．Honest | B．Being honest |
| C．Be honest | D．To be honest |
There will be a large number of people attending the lecture______today’s paper.
| A．basing on | B．according to |
| C．accounting for | D．finding out |
I want to buy a pair of new trousers to ___ my sweater.
| A．go with | B．go off | C．go on with | D．go in for |
There goes the bell for the class.Let’s stop___.
| A．to talk | B．to be talking | C．talked | D．talking |