问题
选择题
_____ medicine works in a human body is a question ____ not everyone can understand fully.
A．How; that
B．That; which
C．That; which
D．What; that
答案
答案：A
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_____ medicine works in a human body is a question ____ not everyone can understand fully.
A．How; that
B．That; which
C．That; which
D．What; that
答案：A