（ ）（you,arrive)before the train( )(get,there)?用过去完成时或者现在完成时或者过去是填空并说出理由为什么

1i will let you know as snow as he -________A arrives B is going to arrive C will arrive D is arriving 2paul was doing his homework ______ there was a knock on the door .who could it be A befor B while C when D after (请给原因?） I'll ring you up ____ I arrive in Shanghai A befor B though C as soon as D but请高手们给出解答的理由 you have to ____(四个字母的单词） a banana befor you can eat it you ----（arrive）at our school tomorrow look befor you leap怎么翻译? Think about these things befor youThink about these things befor you choose a dog .什么意思? when do you arrive What is taken from you befor you get it?帮忙! I aways tell you:Look befor you leap. how do you feel befor exams?—I often get（ ）A.tiredB.happyC.stressed outD.more interested I know you （）（arrive）next Sunday You can't arrive late for class.(改为祈使句） You are too early；the bus --------（not arrive） HAVE YOU BEEN TO YANGSHUO BEFOR翻译成中文是什么意思? Read the ( )befor you take the medicine说明 英语翻译If you feel h___,you can eat some cakes first.(翻译）befor you order food in a restaurant.（翻译） 单项选择：When do you （ ） London?When do you （ ） London?A.arrive B.getC.gettingD.arrive in You shouldn't arrive late for the meeting.（You shouldn't arrive late for the meeting.（改为否定祈使句）