684] Old McDonald gave up smoking for a while, but soon to his old way. [译文] Old McDonald戒烟了一阵子.然而不久又死灰复燃了. A. returned B. returns C. was returning D. had returned [答案及简析] A. 时态题.连词but前后的时态应该基本一致. 查看更多

 

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