Thetimehascome_____wemakeextensiveuseofnuclearenergy.
A、When
B、while
C、as
D、since
Youcantakeanyseat____isfree.
A、inwhich
B、that
C、where
D、which
Mysisterwasn'tinParislastmonth,soyou_____herthere.
A、mightnothaveseen
B、can'thaveseen
C、mustnothaveseen
D、shouldn'thaveseen
Themanwhowasdrivingthedruckwouldnotadmitthathehadbeenatfaultand______.
A、neithertheotherdriverwould
B、neitherwouldtheotherdriver
C、theotherdriverwouldneither
D、neitherhadtheotherdriver
There is a tree ____ a group of League members often play chess.