With more and more farmers moving to cities, an inadequate labor force is    becoming a major factor affecting the country's grain output.
#22941
A
automatically
B
occasionally
C
absolutely
D
gradually
推荐题目
. ______we’ll be able to drive a car______ by electricity, solar energy in about ten years.
#23924
A
ortunately; driven
B
ventually; power
C
uckily; commanded
D
opefully; powered 
The lecture is so attractive that the audience are listening_________.
#22716
A
attentively
B
anxiously
C
effectively
D
absolutely
When Helen saw his tutor nod ________ to her, she calmed down and went on with her performance. 
#23430
A
encouragingly
B
amazingly
C
interestingly
D
astonishingly