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

解析当分词短语作主语时，谓语动词用单数，故选B。

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本试题收录于：大学英语三级A级题库大学英语三级分类

大学英语三级A级

大学英语三级

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Training astronauts______not an easy thing.

大学英语三级A级

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Whichofthefollowingstatementsistrue?Itcanbeconcludedfromthepassagethat______.

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