题目
第1题
Generally speaking,______according to directions,the drug has no side-effect.
A. when taking
B. when taken
C. when to take
D. when to be taken
第2题
Generally speaking,______according to directions,the drug has no side-effect.
A.when taking
B.when taken
C.when to take
D.when to be taken
第3题
A.when taking
B.when to take
C.when to be taken
D.when taken
第4题
Only ______ according to the directions can the medicine be quite effective.
A.taking
B.taken
C.being taken
D.having been taken
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