早教吧 育儿知识 作业答案 考试题库 百科 知识分享

avoiditdoingonceyouhavecuredthewaterpollution,youwillhavetotakestepstoavoiditagain.:A.tohappen;B.happening;C.happens;D.happened,:A.tohappen;B.happening;C.happens;D.happened,选哪个?为什么?

题目详情
avoid it doing
once you have cured the water pollution,you will have to take steps to avoid it___again.
:A.to happen; B.happening; C.happens; D.happened,:A.to happen; B.happening; C.happens; D.happened,
选哪个?为什么?
▼优质解答
答案和解析
avoid是及物动词,后面可以直接接名词,代词,动名词或者是接that从句.在这个题中是接的省略引导词that的从句.