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
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Working hard is not only a _____ of great success, but it is among the essential requirement.
#5107
A
sign
B
singal
C
guarantee
D
expectation
She is in a poor ______of health,which worries her mother much.
#7284
A
position
B
situation
C
state
D
condition
There was a tall boy sitting in front of me, blocking my _____ completely.
#5178
A
scene
B
sight
C
scenery
D
view
—How can I use this washing machine?—Well, just refer to the _______.
#7232
A
explanations
B
expressions
C
introductions
D
directions