.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

此处选择B
这个空是填when taking还是when taken 要看后一个句子的主语是什么.
这里由the drug得知主语是drug,由于药只能被吃所以是taken.
若主语是人,就应该是:
.Generally speaking , when taking according to the directions,you will not suffer from side effect.
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第1个回答  2006-08-09
Generally speaking when taken according to the directions,the drug has no side effect. 状语从句+定语从句,原型为 Generally speaking when(the drug is)taken according to the directions,the drug has no side effect.

第2个回答  2006-08-09
B
第3个回答  2006-08-09
D.

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