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。
如果觉得《The houses for the low-income families at present in our city will be completed next year。》对你有帮助，请点赞、收藏，并留下你的观点哦！
