用across,along,down,from,into,off,onto,outof,over,round,through,to...答:2.along: We coasted along on our bicycles.我们骑着自行车向前滑行。The doctor knifes carefully along a bone in his leg.医生小心地沿着他的一块腿骨用刀切过。I saw them running together along the road yesterday.我昨天看见他们沿着马路一起跑。3.down: She booked me down for next ...