The students _______ busily when Miss Brown went to get a book she _______ in the office.
[     ]
A.  had written; left        
B.  were writing; has left  
C.  had written; had left    
D.  were writing; had left
練習(xí)冊(cè)系列答案
相關(guān)習(xí)題

科目：高中英語(yǔ) 來(lái)源： 題型：

On the street I saw a studen _____ I thought was English.

　 A. whom 　 B. who

　 C. the one 　 D. he

 

查看答案和解析>>

同步練習(xí)冊(cè)答案