It is of vital importance that a person ______ at least both physically and mentally strong to be an astronaut(宇航员).

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问题 It is of vital importance that a person ______ at least both physically and mentally strong to be an astronaut(宇航员).

选项 A、shall be
B、be
C、are to be
D、must be

答案B

解析 语法结构题。it is of vital importance=it is very important,本题考查主语从句中的虚拟语气,谓语动词用should+动词原形,should可省略。句意:要成为一个宇航员,身心健康是非常重要的。
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本试题收录于: 英语题库普高专升本分类
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