The article suggests that when a person _______ under unusual stress he should be especially careful. ( 章节：1 难度：3)
- A、is
- B、be
- C、were
- D、was
正确答案:A
答案解析:有
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The article suggests that when a person _______ under unusual stress he should be especially careful. ( 章节：1 难度：3)
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