Taking physical exercise regularly is an effective way to avoid with the flu.A. to infect

问题补充：

Taking physical exercise regularly is an effective way to avoid with the flu.

A. to infect

B. infecting

C. to be infected

D. being infected

答案：

A. to infect

B. infecting

C. to be infected

(答案→)D. being infected

解析：可联系答.案.网客服索取。

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