选择填空。-WhileJohn

问题详情：

选择填空。

-While John_____ the piano, Mary ___ the house.

  - Really, didn’t she like his performance?

   A. played  left                        B. was playing  left 

   C. was playing  was leaving    D. played   was leaving

【回答】

B

知识点：动词时态

题型：选择题