He           very hard when he was a student.

A. study      
B. studied    
C. studies      
D. studying
B
請在這里輸入關(guān)鍵詞:
相關(guān)習題

科目:小學英語 來源:同步題 題型:單選題

He           very hard when he was a student.
[     ]
A. study      
B. studied    
C. studies      
D. studying

查看答案和解析>>


同步練習冊答案
关 闭