问题
选择题
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
答案：D
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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：D