_____ a teacher in a university it is necessary
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_____ a teacher in a university, it is necessary to have at least a master's degree.
(A) To become (B) Become (C) One become (D) On becoming
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换个语序就可以了
itisnecessarytohaveatleastamaster'sdegree------ateacherinauniversity
显然应该填tobecome
这里的tobecomeateacherinauniversity做主语,用becoming应该也可以,但题目中没有这个选项
而CD中都有one,有sb的一般会有for出现,而题中没有,因此只能选A
