题目内容：
His classmates offered him their congratulations ______ his successful performance.A．atB．onC．forD．of
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单选题：His classmates offered him their congratulations ______ his ..
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—What's made Tommy so upset?—I believe______the game.It s..
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Lance Armstrong is believed ______drugs in the past competit..
Lance Armstrong is believed ______drugs in the past competitive cycling races. A．to takeB．to be takingC．to have takenD．to be taken
— I came here by taxi and the driver _____ me 50 yuan. — Re..
— I came here by taxi and the driver _____ me 50 yuan. — Really? You _____ by bus.[ ]A. paid; should come B. cost; should have come C. charged; ought to have come D. spent; ought to come
_________at the cafeteria before, Tina didn’t want to eat t..
_________at the cafeteria before, Tina didn’t want to eat there again.A．Having eatenB．To eatC．EatD．Eating
A large number of people are held up in the railway stationf..
A large number of people are held up in the railway stationfor tickets to return home．A．waitB．waitedC．to waitD．waiting