17.(上海市嘉定黄浦2010年4月高考模拟文科)已知无穷等比数列的前项和,且是常数,则此无穷等比数列各项的和是……………………………………………………………………………………( D )
A.. B.. C.. D..
40. -----I’m thinking of the test tomorrow, I’m afraid I can’t pass this time.
-----_________! I’m sure you’ll make it.
A. Go head B. Good luck C. No problem D. Cheer up
39. The Great Wall is ______ tourists attraction that millions of people pour in every year.
A. so a well known B. such a well known
C. a so well known D. such well known a
38. It ___ have been Tom that parked the car here , as he is the only one with a car.
A may B can C must D should
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