If we________ , we can realize the progress we have made in space research.
#81909
A
turn back
B
look back
C
answer back
D
move back
推荐题目
Because the manager had some important guests to meet, the meeting only _____ a few minutes.
#67668
A
kept
B
continued
C
lasted
D
covered
---Tom, keep your_____ on your studies. --- Sure, mum. I'll keep that in_____.
#84113
A
mind;mind
B
heart;head
C
brain; mind
D
heart;brain
--- What are you reading there, Susan? --- Nothing interesting. I am just ________ the pages to kill time.
#71080
A
turning over
B
turning up
C
turning around
D
turning down
.The Red Army ____ more than 25,000 li and arrived at North Shanxi at last.
#73090
A
walked
B
ran
C
covered
D
travel
The electricity ____, the light went out.
#77100
A
cut off
B
having cut off
C
was cut off
D
had cut off