单项选择题
A.off B.in C.on D.up
A.let B.visited C.landed D.touched
A.isolated B.generated C.accelerated D.congratulated
A.Haven’t B.Hasn’t C.Didn’t D.Aren’t
A.buy B.to buying C.buying D.to buy
A.rested B.reposed C.sat D.stood
A.at B.on C.to D.in
A.from B.into C.over D.beneath
A.each otherB.every otherC.on one way or anotherD.any other
A.did I B.had I C.I had D.I did
A.sit B.be sit C.sitting D.sits