I had planned for the housecloser to a river, but I was told there was a danger of floodin

网友回答

A. built
(答案→)B. to be built
C. being built
D. be built
解析：考查非谓语动词。根据plan可知，房子是计划建在河边，所以选to be built，表示将来发生的动作   built表示动作已经发生 being built表示正在发生 be built为谓语形式，不符合题意。