[单选题]____________, follow the directions on the bottle carefully.
AWhen taken the pillsb.When taking the pillsc.When one takes the pillsd.When takes the pills
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参考答案
试题答案：
B
答案解释：
本题考查非限定动词用法，本题主句为祈使句，主语为you，当从句的主语和主句一致时，并且从句的谓语动词为be动词的时候，从句的主语和be动词都可以省略，所以应当选择B。本句补充完成为：When you are taking the pills, followthe directions on the bottle carefully.
