下列物质属于纯净物的是 ( )
The photos that won the first prize in the competition will be _____on the website.( )
A.put awayB.put offC.put upD.put on
I always hate being late for school.
______( )
A.So am I.B.So do I.C.So I am.D.So I do.
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