一道英语选择题Youcanpaynoworyoucomebacktopickupthebike.A.whenB.whileC.asD.then选什么?请详细说明理由.追加分!各位答案是B解释一下while在此句中的用法

Question

一道英语选择题
You can pay now or____you come back to pick up the bike.
A.when B.while C.as D.then
选什么?请详细说明理由.追加分!
各位
答案是B
解释一下while在此句中的用法

Answer 1

You can pay now or____you come back to pick up the bike.
A.when B.while C.as D.then
选B
while: 1.当……时候
2 虽然
3 然而
when: 在那时
as: 像……一样
then: 然后