题目

 I learnt to swim when I was six. I ___________ by my mother.     A. am taught            B. was taught           C. will be taught       D. have taught 答案：B  【解析】考查动词时态及语态。句意：我六岁时学习游泳，是我妈妈教我的。由“"when I was six”可知要用过去时态.主语为I,是teach动作的接受者，因此谓语应用过去式的被动语态。故选B。

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