In the last few years thousands of films __________ allover the word.（2011天津卷3）
| A．have produced |
| B．have been produced |
| C．are producing |
| D．are being produced |
He has made a discovery, _________ of great importance to the progress of science and technology．
| A．I think which is | B．which I think is |
| C．which I think it | D．which I think it is |
Rosy came in for _________ coffee and told me _________ firecrackers outside kept her awake last night．
| A．a; the | B．不填; the |
| C．the; a | D．a; the |
—Dad, where on earth did you put my raincoat?
—Oh, Jim．I forgot to tell you．It _________ behind your bedroom door．
| A．would hang | B．has hung |
| C．is hanging | D．hung |
In autumn, _________ the weather is often cool and fine, people living in the city always like climbing hills for outdoor activities to strengthen their health．
| A．which | B．where | C．as | D．when |
—I telephoned him twice and I couldn’t get through to him．
—The line might have been out of order, _________?
| A．don’t you | B．do you |
| C．wasn’t it | D．hadn’t it |