听力原文：Why does the man get ill?
(21)
A．He has never been immunized.
B．He doesn't rest enough due to hard work.
C．He doesn't like to take medicine.
D．He is exposed to the virus-filled environment.

A.He
B.
B．He
C.
C．He
D.
D．He
E.


【参考答案】

D
解析：本题问“男士通常得病的原因是什么?”男士说“在假期我会花很多时间去商场为大家买礼物”。女士说，“这样的......

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