( )Someone at the door when she was cooking in the kitchen. A. had knocked B . has knocked C.knocks D. knocked 查看更多

 

题目列表(包括答案和解析)

Someone________the door when she was cooking in the kitchen.  
[     ]
A. had knocked            
B. has knocked  
C. knocked at              
D. knocked

查看答案和解析>>


同步练习册答案