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单选题
63._____a doctor in a hospital, one must have at least a master's degree.
A
To Become
B
Become
C
One become
D
On becoming
答案解析
正确答案：A
解析：
解析:要成为医院里的一名医生,一个人必须至少有硕士学位。
分析句子结构可知,逗号后面是一个完整的向子,且逗号前后两部分之间没有连词,所以空处应用非谓语动词,因此可排除B、C两项。on doing sth. 意为“⋯就.......,不符合题意,故可排除D项。根据句意可知,空处应用不定式,和空后的a doctor in a hospital一起作目的状语。故选A
分析句子结构可知,逗号后面是一个完整的向子,且逗号前后两部分之间没有连词,所以空处应用非谓语动词,因此可排除B、C两项。on doing sth. 意为“⋯就.......,不符合题意,故可排除D项。根据句意可知,空处应用不定式,和空后的a doctor in a hospital一起作目的状语。故选A
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