There's no ticket left for Lang Lang's piano concert. you your sister can go to it.( )
A.Both; andB.Not only; but also
C.Either; orD.Neither; nor
Doctor Bethune sometimes had to treat the wounded on _____ own.( )
A.himB.hisC.themD.their
The Three Gorges Dam produces _____for millions of people in China.( )
A.electricityB.influence
C.transportD.technology
Students here often do physics experiments _____small groups.( )
A.byB.inC.forD.at
To prepare for _____trip to LA, Betty is making _____list of things to take along.( )
A.the; theB.不填; aC.the; aD.a; 不填
There is so much noise in the next room.I wonder__________________.( )
A.what are they doingB.what were they doing
C.what they are doingD.what they were doing