_____ he arrives,we can start.A.Since B.Before C.After D.Once 请问选C还是D,为什么另一个不对?

_____ he arrives,we can start.A.Since B.Before C.After D.Once 请问选C还是D,为什么另一个不对? What ____ they ____ last night?(do)还有：He ____ (be) very ill before he _____ (die).We _____ (not disturb) him until he ) _____ (finish) working.When _____ the visitors _____ (arrives) last Sunday?_____ you _____ (finish) your reading yet?You'd b I wonder if he _____ in Shanghai.If he _____ tomorrow,I'll phone him.A)aarrives,arrives B)arrives,will arrive C)will arrive,arrives D)will arrive,will arrive he never arrives ( )school late Is Tom coming?Yes.He is _____ Wuhan next Sunday.A:arrive in B:arrives in c:arrivingD:arriving in by the time he arrives in tianjing,we would have stayed for two days如何解释这个时态 by the time he arrives in beijing ,we ___here for two daysA will have stayed B have been staying he is a friend of _____(we) We hear he _____(return)next month He arrives the airport.什麼意思? He arrives home.为什么home前不加介词 By the time he arrives in Beijing, we ________ here for two days.A. will be arriving B. have been stayingC. have stayed D. will have stayed ( )1.Please write to _____ soon .A.we B.our C.us D.my( )2.How is the hat A.too B.good C.lot D.bad( )3.When the plane _____ Beijing ,I will tell you .A.arrive in B.arrives in C.arrives at D.arrive at( )4.Can you tell me the way _____ the park A.on B.i We are very_____(surprise)_____(know)he failed the exam. We would be very much pleased if he _____( come ). He says we can feed the pig on anything here.He says we can ____ _____ _____ ______the pig. He will give me a call as soon as he _____ in Beijing.根据句意填空.我感觉应该用arrive 这个词,但有人写arrived,是不是不能算对啊?应该是arrives吧? He often arrives late for meeting 同义句