Thetimehascome_____wemakeextensiveuseofnuclearenergy.
A、WhenA
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-“You finally made it,didn't you ?”
-“ Yes， ____ your help,I wouldn't have succeeded.”
The doctor ____ is leaving for Africa next month.
He built a telescope ____ he could study the skies in his free time.
Do you know the reason ____ he was late?
There is a tree ____ a group of League members often play chess.
