選擇填空。-WhileJohn

問題詳情：

選擇填空。

-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

知識點：動詞時態

題型：選擇題