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第1题

Scientists say it may be five or ten years _______ it is possible to test this medicine on human patients. A.since B.b
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第2题

The international situation is very _______ in the Middle East. A.A) delicious B.perfect C. delicate D. percent
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第3题

_________ table tennis was accepted as a regular part of the Olympic Games. A.Not until 1986 B. It was not until 198
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第4题

he failed, he won.t give up his ideals. he failed, he won.t give up his ideals. A.if B.e
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