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 taken
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 taken
答案：B