Thetimehascome_____wemakeextensiveuseofnuclearenergy.
A、When
B、while
C、as
D、since
Thedoctor____isleavingforAfricanextmonth.
A、thenurseistalkingtohim
B、whomthenurseistalking
C、thenurseistalkingto
D、whothenurseistalking
Nancy:MayIseeyourdrivinglicenseandvehicleregistrationcard,please?
Dick:______.
A、Sorry,Iforgottobringmyhomework
B、SureHereismybusinesscard
C、GoodDidIdoanythingwrong?
D、YesButIdon'tthinkIamagoodstudent
"Lookwhatyou'vedone!You______morecareful."
A、hadtobe
B、shouldbe
C、shouldhavebeen
D、mustbe
Togetthejobstarted,____Ineedisyourpermission.
A、onlywhat
B、allwhat
C、allthat
D、onlythat