When they arrive,he is outside.如果是是什么从句?从哪是一句话 以及翻译

When they arrive,he is outside.如果是是什么从句?从哪是一句话 以及翻译 改错:When did they arrive Beijing?如题 改错:When did they arrive Beijing?改错:When did they arrive Beijing? When did they arrive ( ) the airport I don't know when he ____,when he ______,i will tell youAwill arrive;will arrive B.arrive;arrive C.arrives;will arrive D.will arrive; arrives I don’t know when he (arrive). When he (arrive) here, I will call you. I don't know when he ___(arrive）填什么是will arrive 还是has arrive when did he ____?A.arrive B.arrive in C.arrive at D.get when will they ( -( )the seventh of julya.arrive,On b.arrive at,Onc.arrive in,Ind.arrive,In When will they arrive to the airport的错误 When will they ____ the Pudong Airport.a.arrive in b.reach to c.arrive at 英语翻译是否都为：when will they arrive?Where will they arrive?可是arrive不是不及物动词吗?为啥arrive后面不加in或者at呢? 英语强人快进啊~When did they reach?如果不可以,when did they arrive呢? I ____just ____（arrive）when he left . could you tell me when he would/will arrive?二选一 1.when I (arrive)at the station,he (leave) When did he ( A.arrive inB.arrrive at C.get toD.reach E.get F.arrive Do you know when he----?When he -----,please call me.用arrive的适当形式填空 you know……?A.when they have a discussion about B.How didi they arrive there C.what we will do next D.If he is a doctor or not答案貌似是C.D为什么不可以?