30. The subway __________in our city, and I’m sure there will be fewer traffic jams in the future.
| A．is building | B．is built | C．is being built | D．will build |
.
When Bill Gates decided to stop schooling and created Microsoft in 1975, he ______ law at Harvard University.
| A．studied | B．had studied | C．was studying | D．would study |
.
In the rainforest of the Amazon, 50 to 150 plant species _____ every day.
| A．have been destroyed | B．are destroying | C．are being destroyed | D．destroyed |
.
–Finished the novel? How do you find it?
–_______ It’s worth reading a second time.
| A．I didn’t get that. | B．It’s totally fascinating! |
| C．A friend lent it to me. | D．I bought it from the library. |
.
To help today’s customers make a choice, a company in New York _____a video trolley — a supermarket trolley with a video screen to display advertisement and price information.
| A．has invented | B．had invented | C．invents | D．is inventing |
He ______ in Shanghai University for four years before he ______ Beijing.
| A．studied, had gone | B．had studied, went |
| C．has studied, goes | D．had studied, had gone |
They said they ______ do some sports if it was fine.
| A．were going to | B．went | C．would going | D．were going |
Some people complain that it usually so long to buy train tickets during the Spring Festival.
| A．spares | B．spends | C．takes | D．costs |
Great changes ______ in China in the past 20 years.
| A．took place | B．have taken place | C．were taken place | D．have been taken place |
Professor Liu has ________ teach psychology since he came to the Central China Normal
University.
| A．determination to | B．been determined to | C．been determining to | D．determined to |
Catherine is one of the brightest students who from the Department of Computer Science , Brown University .
| A．is graduated | B．has graduated | C．are graduated | D．have graduated |
The hero’s story______ differently in the newspapers.
| A．was reported | B．was reporting | C．reports | D．reported |
The palace caught fires three times in the last century,and little of the original building now.
| A．remains | B．is remained | C．is remaining | D．has been remained |
The new type of computer ________ better if it is advertised on TV.
| A．will sell | B．sells | C．would sell | D．will be sold |
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