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
.If you’re looking for a________, you can make it when it is on sale.
#6752
A
bargain
B
price
C
cost
D
bill
In China, peach is a ______of long life and therefore makes an ideal birthday present.
#5126
A
symbol
B
sign
C
signal
D
symptom
. Probability is the mathematical study of the _____ of an event’s occurrence.
#6740
A
desire
B
likelihood
C
result
D
effect
His name is on the _______ of my tongue, but I just couldn’t remember it.
#6877
A
tip
B
top
C
side
D
end