题目内容
10.David used to _______ as a doctor,but now he is a guide.( )| A. | work | B. | working | C. | worked |
分析 大卫过去是一名医生,但是现在是一个导游.
解答 答案:A
根据题意"大卫过去是一名医生,但是现在是一个导游.",可知used to do过去常常…,这是固定用法,结合选项,A.是动词原形 B是动名词 C是过去式,故选A.
点评 熟悉动词时态的基本判断用法,结合题意,给出答案.
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