题目内容
15.He could have been a doctor 20 years ago,but he ______ to be a teacher.( )A. | chose | B. | had chosen | C. | has chosen | D. | chooses |
分析 二十年前他本来可以当一名医生,但他选择了当老师.
解答 答案:A
题干中He could have been a doctor 20 years ago表示对过去事实的相反假设;句中20 years ago是过去的时间状语,表示过去发生的事实,要用一般过去时态.故选A.
点评 一般过去时态表示过去某个时间发生的动作或存在的状态或表示过去经常或过去反复发生的动作.
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