Notuntilhisfathercamein　　　todohishomework. A.theboybeg...

問題詳情：

 Not until his father came in 　　　 to do his homework. 

A. the boy begins B. has the boy begun

C. did the boy begin                      D. the boy began

【回答】

C

知識點：倒裝與省略

題型：選擇題