来自孙弢的问题
【__________theearlyflight，weorderedataxiinadvanceandgotupveryearly．（）A.CatchingB.CaughtC.TocatchD.Catch】
__________ the early flight，we ordered a taxi in advance and got up very early．（）
A.Catching
B.Caught
C.To catch
D.Catch
