Training astronauts______not an easy thing.

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问题 Training astronauts______not an easy thing.

选项 A、are
B、is
C、were
D、be

答案B

解析句意：训练宇航员可不是件容易的事。该题考查的是主谓一致。当主语是个抽象的概念时谓语动词用单数。

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本试题收录于：英语题库普高专升本分类

英语

普高专升本

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Training astronauts______not an easy thing.

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