问题
选择题
Generally speaking， ______ according to the directions，the drug has no side effect．
A．when taking
B．when taken
C．when to take
D．when to be taker
答案
答案：B
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Generally speaking， ______ according to the directions，the drug has no side effect．
A．when taking
B．when taken
C．when to take
D．when to be taker
答案：B