【题目】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
在线课程【答案】C
【解析】
试题分析：考查动词非谓语形式。句意：在我们市，为低收入人群目前在建的住房将于明年完工。build与其逻辑主语houses是被动关系，又因句中at present(目前)，所以需用现在分词的被动形式，故选C。