问题

While playing ping-pong, our eyes see the ball coming, judge its speed and then hit it back ________ it should go.

A:when
B:why
C:what
D:where

正确答案是：

同类题型

Please don’t get too close to the building______ roof is under repair.

Do you know ________?— I’m not sure Maybe he is a businessman

Festivals and celebrations of all kinds _________everywhere since ancient times. [ ]

Do you often at your friends’ home on your way home—Yes, we do.

Hardlyto the station when the train left.