I will call you at once when you get to Australia

I will call you at once when you get to Australia when they ___,I will call you.A.arrive B.reach C.get to D.ar ___I get to Pairs,I will call you up at the airport. i (call) you when i get to beijing tomorrow. when i came back to dongguan,i will call you I don't know when Mr.Li ____ back.But I'll call you at once I will call you when I get home 的成分怎么划 I am late and will be there in Call me when you get this mes i will call you when i am back to Dongguan so you can stay w when I arrive at the hotel,I will call you是一个什么从句 When will you go to Australia?I must wait until this term___ I will call her at once 是什么意思