问题补充:
The workersa new bridge now. The traffic in our city will be better soon.
A. build
B. built
C. are building
D. were building
答案:
A. build
B. built
(答案→)C. are building
D. were building
解析:此题考查动词的时态。根据now可知考查的是现在进行时的基本构成,be+ving,因the workers是复数,系动词be要用are,故选C。