After (driving) twenty miles, he suddenly (realized) that he (has been) (driving

游客2025-03-17 31

问题 After (driving) twenty miles, he suddenly (realized) that he (has been) (driving) in a wrong direction.

选项 A、driving
B、realized
C、has been
D、driving

答案 C

解析应改为had been。表示已经开了那么久，前面用了过去时realized，后面用过去完成时。

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