单项选择题

Suddenly he heard someone（）gently on the window.

A. knock
B. knocking
C. knocked
D. to knock

<上一题 目录 下一题>
热门 试题

单项选择题
I couldn't understand why he pretended （）in the bookstroe.

A. to see me not
B. not to see me
C. not see me
D. to see not me
单项选择题
Do you think Stephen Hawkins is the greatest man（）

A. alive
B. lively
C. live
D. living
相关试题