问题补充:
The houses for the low-income families at present in our city will be completed next year。
A. to be built
B. built
C. being built
D. having been built
答案:
A. to be built
B. built
(答案→)C. being built
D. having been built
解析:句意:我们城市现在正在为低收入家庭建的房子明年将完工。这里需要定语修饰houses,因为the houses和build是被动关系,而且时间是at present,所以用现在分词的被动表示“正在被…”,A. to be built“将要被…”,B. built“被…”,C. being built正在被…,D. having been built已经被…,(一般不做定语),
所以选C。