they usually wear a collar and tie___ 1 as they work 2 to work 3 going to work 4 in order to work选择哪一个,及为什么
问题描述：
they usually wear a collar and tie___ 1 as they work 2 to work 3 going to work 4 in order to work
选择哪一个,及为什么
答
1
只有介词as有表示当。。。之时的意思，其他都不行。
答
选A.
as they work在此相当于when they work，就是”当他们工作时“的意思。
答
答案是B
语法：
wear sth to work
wear sth to school
把-- -穿到 -- - -