they are --- a bus now A waiting for B waiting选哪个啊

they ,for ,bus ,the,waiting,are,a 连词成句 They are two ways to pay for a bus. They are waiting_____a bus stop.They are waiting _____ a bus stop.A.at B.for C.in D.on They are at the bus why are they at the bus stop 为什么用I think the are waiting for a bus进行时态回答 The visitors on the bus are (a ) from America.They are Americans The visitors on the bus are (a ) from America.They are Americans they are waiting for a bus ___ the bus stop.a.in b.to c.on d.at bus they waiting are a for （.） 连词bus they waiting are a for （.） 连词成句. 在线等,给好评. They are going to work （） A.in a car or by bus B．drive a car or bus C.by a car or bus. They are going there by bus对by bus提问 They are bus drivers.改为复数形式 why are they at the bus stop? why are they at the bus stpp? ——What are these?—— A.It is a bus.B.Those are buses.C.They are buses. they are --- a bus now A waiting for B waiting选哪个啊 They are waiting ___the bus stop A.in B.at C.on Look,they are waiting for a bus at the ____ ____