Before the first non-stop flight made in 1949, it ________ necessary for all planes to land for refueling.

A．) would be B) has been

C．) had been D) would have been

 

 

[试题]B．eforethefirstnon-stopflightmadein1949,it________necessaryforallplanestolandforrefueling.A．)wouldbeB)hasbeenC)hadbeenD)wouldhavebeen

[单选题]---What should I do first before boarding? ----().A．You may ask the policeman there to help.B．Please go to the airline counter to check-in for your flight.C．You should wait and see.D．You have to go there to check in for your flight.

[单选题]24．The Egyptians made the first balls with _________ ．A． animal skinB． something lightC． leaves and vinesD． paper

[单选题]A financial contract offers to pay €1,200 per month for five years with the

[单选题]A financial contract offers to pay (:1,200 per month for five years with th

[单选题]翻译“domestic flight”( )A．国内航班B．国际航班C．航线D．机场费

[单选题]not to miss the flight at 15:20, the manager set out for the airport in a hurry.A． Reminding B. Reminded C. To remind D. Having reminded

[单选题]Jenny nearly missed the flight____________ doing too much shopping.A． as a result of B. on top of C. in front of D. in need of

[试题]F．ormation flight is more comfortable because passengers can not see the other planes.

[单选题]We were infordmed that our flight ____ because of the mechanic failureA．have canceelledB．canceelledC．have been canceelledD．had canceelled