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Only according to the directions can the medicine be quite effective.A.takingB.t

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Only according to the directions can the medicine be quite effective.A.takingB.t

Only ______according to the directions can the medicine be quite effective.

A.taking

B.taken

C.being taken

D.having been taken

试题答案

B

考查分词用法。Medicine与take之间构成被动关系,所以使用过去分词的形式,C表示正在被服用;D表示已经被服用;句意:只有根据说明书服用,这个要才相当有效。