单选题
Before the Spring Festival,the leaders of the village made house‐to‐house survey,（ ）in each family about their needs and problems.
Ato inquire
Bto be inquiring
Cinquiring
Dinquired
正确答案
答案解析
该题考查非谓语动词.首先排除D选项,因为inquire应是the leaders发出的应为主动形式。选项A为不定式,而不定式做状语表目的时常置于句首,置于句中时常用in order to...形式;选项B为不定式的进行式,常出现在如下句型中：He happened to（to）be directing the traffic。故答案为C，现在分词做状语伴随made这一动作。