请问When than plane took off,this one has already landed in the airport后接Safe的什么形式

请问When than plane took off,this one has already landed in the airport后接Safe的什么形式 the plane when we got to the airport When a bird flew to the plane,it lost c_____ It takes____(little) time to go to Beijing by plane than by train. It'safer than _____by plane.A.go B.going C.to go D.to going has it been announced when the plane is to take off中为什么用when ( )When did the plane A.get B.get to C.reach D.arrive( )I'm sorry I've kept you _ for so long.A.wait B.waiting C.reach D.arrive( )She planned everything _ I did.A.well than B.good than C.better than D.better 乘公共汽车旅行比乘飞机便宜得多.It's () () to travel by bus than bu plane. He is going to travel by plane rather than by train.（否定形式） it took them( ) more hours to go there by train than by plane.A many Bmuch i'like to see you off at the airport . Could you tell me ___ ? A when your plane will take offB when your plane took off 请问when it comes to we must pay attention to the _____(safe)when we take the plane when Jack hears that--is coming soon,he goes to board the plane ... does Lucy get to Harbin?By plane when B How often C how when is the plane to zhengzhou as soon as possible.怎么翻译? When she got to the a__,the plane had taken off when is the next plane for America America前面为什么用介词for而不是to?