Before leaving this country,you must be in__of a valid passport A provide B possession C core D lab

Leaving me like this! Before leaving this country,you must be in__of a valid passport A provide B possession C core D lab If you're leaving take this... 改写I am leaving this city tomorrow Before leaving your head down to kiss my hair ends ____they were leaving ,用before还是as好 Please turn in your paper before leaving?该句话是什么意思? Please turn in your paper before leaving.中文翻译 请问after和before后面的动词要用ing吗?比如after he leaving 或before he leaving leaving leaving leaving Please ________________ that the lab is locked before leaving.The population of this town ______________________ five percent last year.We are all surprised that he ________________________ such _________________ in such a short time.The doctors are 英语翻译This merchandise was thoroughly inspected and carefully packed before leaving our plant.Responsibility for its safe delivery was assumed by the carrier at the time of shipment.Claims for loss or damage to the contents,should therefore,be 这里that was 这样用可以吗?前提：Pls.make sure the bag is put in the box before you leaving office!回答：Don't worry about this,that was done! We for___ Shanghai this coming weekend A.leave B.leaving C.are leaving D.left She is leaving for Hainan this weekend.句子中leaving for为什么不用成going to? do not forget to turn off the lights before leaving the room 为什么是leaving 不是leave