It is widely accepted that animals learn to do things because their certain acts lead to _______.
#6274
A
rewards
B
prize
C
awards
D
results
推荐题目
The top leaders of the two countries are holding talks in a friendly______
#7195
A
atmosphere
B
state
C
situation
D
phenomenon
Would you mind my ______ her to the party? Would you mind not ______ to the party? 
#6525
A
being invited, invited
B
being invited, being invited
C
inviting, invited
D
inviting, being invited
The ______on his face told me that he was angry.
#7463
A
impression
B
sight
C
appearance
D
expression