The mobile phone has changed people’s life a lot ______

试题详情及答案解析

The mobile phone has changed people’s life a lot ________ it was invented.

A．until

B．since

C．before

D．after

答案：B

试题分析：A. until直到；B. since自从；C. before 在……之前；D. after在……之后；句意；自从它被发明以来，手机已经影响了我们的生活很多。，结合语境可知选B。
考点：考查连词辨析