单项选择题

The average speed of a ball hit by a Pingpang racquet (球拍)is the ______ among all ball games.

A．lowest
B．highest
C．quickest
D．most full
<上一题 目录 下一题>
热门 试题

单项选择题
I' m sure the letter won' t arrive in time ______ it is sent by air.
A．if
B．until
C．because
D．unless
单项选择题
Had it not been for my illness, I ______ him a helping hand.
A．had lent
B．were to lend
C．would have lent
D．should lend
相关试题