Only since they gave up that good chance___ to show their invention again. 
#83887
A
have they had no chance
B
they have had no chance
C
they have no chance
D
have they no chance
推荐题目
—How much do you know about the 3D film technology?—A little. Not until _______the hot movie Avatar _______ some about it.
#82709
A
did I see; did I begin to learn
B
I saw; I began to learn
C
I saw; did I begin to learn
D
did I see; I began to learn
Only after he realized the significance of mastering two languages ______ English carefully.
#81050
A
did he set about learning
B
did he set out learning
C
had he set about learning
D
had he set out learning
Only when the fire was under control       to return to their homes.
#82459
A
the residents would be permitted   
B
had the residents been permitted
C
would the residents be permitted
D
the residents had been permitted