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外语
Training astronauts______not an easy thing.
Training astronauts______not an easy thing.
admin
2015-03-17
19
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
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大学英语三级A级
大学英语三级
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