单选题:All flights __________ because of the snowstorm, many passen

题目内容:
All flights __________ because of the snowstorm, many passengers could do nothing but take the train. A.had been canceled
B.have been canceled
C.were canceled
D.having been canceled

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答案解析:

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According to the passage, to combat the flu effectively, one

According to the passage, to combat the flu effectively, one should ___.A.identi

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根据以下内容回答题: The rise of multinational corporations (跨国公司), gl

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The main purpose of the author is to ______.

The main purpose of the author is to ______.A.talk about richest people in China

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Last year the total wealth of the first 50 richest people in

Last year the total wealth of the first 50 richest people in China is about ____

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