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科目： 來源：不詳 題型：單選題

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Many wild animals in the world _____ , so we must take measures to protect them.
A．are dying outB．have died outC．died outD．die out

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科目： 來源：不詳 題型：單選題

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Did you see a girl in white pass by just now ?
No , sir .I ____a  newspaper .
A． readB．had readC．would readD．was reading

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科目： 來源：不詳 題型：單選題

2008 was a great year，since when it     great changes in China．
A．sawB．had seenC．has seenD．was seeing

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科目： 來源：不詳 題型：單選題

—How is your collection going?
—I need one more stamp before my collection     ．
A．is completedB．will be completedC．has finishedD．will be finished

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科目： 來源：不詳 題型：單選題

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My parents ____ in Hengshui. They were born there and have never lived anywhere else.
A．liveB．livedC．were livingD．will live

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科目： 來源：不詳 題型：單選題

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Because of the sharp drop of birth rate, the number of students sitting the college entrance exams ______ all the time
A．is decliningB．has declined
C．have been declinedD．were declining

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科目： 來源：不詳 題型：單選題

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When Bill Gates decided to stop schooling and created Microsoft in 1975, he ______ law at Harvard University.
A．studiedB．had studiedC．was studyingD．would study

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科目： 來源：不詳 題型：單選題

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If a computer crashes, you will lose the file you _________unless you save it regularly.
A．are workingB．workC．will workD．worked

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科目： 來源：不詳 題型：單選題

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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 inventedB．had inventedC．inventsD．is inventing

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科目： 來源：不詳 題型：單選題

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In the rainforest of the Amazon, 50 to 150 plant species _____ every day.
A．have been destroyedB．are destroyingC．are being destroyedD．destroyed

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