四川电信流量套餐:一道英语题

来源:百度文库 编辑:杭州交通信息网 时间:2024/04/25 09:07:34
Jim has been in the factory for two years ( )he left school .
a.when b.since c.as soon as d.whether

b因为完成时中用since引导时间点的从句

B

b~~~~~~~~~~~~~`