Question

Zhengzhou will be more and more convenient when Zhengzhou Subway_____ in two years.

1. A.
   is completed
2. B.
   will be completed
3. C.
   will complete
4. D.
   has completed

Answer 1

A
考查时态。主句Zhengzhou will be more and more convenient是一般将来时态，所以when引导的时间状语从句要用一般现在时代替一般将来时。且主语Zhengzhou Subway和complete之间是动宾关系，要用被动语态。所以选A，一般现在时态的被动语态。