单项选择题

The trainer usually gives the animal a piece of candy or fruit ()

A. when it is hungry
B. before it plays a trick
C. when it starts to play a trick
D. after it has done the trick

<上一题 目录 下一题>
热门 试题

单项选择题
The Alsatian’s olfactory cells are ()times as many as man’s.

A. forty-four
B. one million
C. 220 million
D. 10,000
单项选择题
22()

A.poor 
B.rich 
C.famous 
D.unknown
相关试题