William______byamotorbikeinthestreetandIamgoingtoseehi...

問題詳情：

 William ______ by a motorbike in the street and I am going to see him in the hospital.

A. is knocked down                            B. has been knocked down  

C. has knocked down                           D. had knocked down

【回答】

B

知識點：現在完成時及其被動式

題型：選擇題