Bears_____ fat stores throughout the summer and fall to have energy enough to last them through their winter sleep.
#13835
A
pack up
B
build up
C
bring up
D
take up
推荐题目
 We _____ a word unless she asks us_____.
#12894
A
didn’t dare say; to
B
don’t dare to say; to
C
dared not say; to say
D
dare not to say; to say
They are broadening the bridge to       the flow of traffic. 
#12044
A
put off
B
speed up
C
turn on
D
work out