一道高三英文选择题______pollution is the key to ____the country a comfortable and clean place to live in.A.To control; keep B.To control;keeping C.Control;Keeping D.Controlling; keep.我知道答案是B.但是想问一下为什么是B以

来源:学生作业帮助网 编辑:作业帮 时间:2024/04/28 17:36:27
一道高三英文选择题______pollution is the key to ____the country a comfortable and clean place to live in.A.To control; keep B.To control;keeping  C.Control;Keeping  D.Controlling; keep.我知道答案是B.但是想问一下为什么是B以

一道高三英文选择题______pollution is the key to ____the country a comfortable and clean place to live in.A.To control; keep B.To control;keeping C.Control;Keeping D.Controlling; keep.我知道答案是B.但是想问一下为什么是B以
一道高三英文选择题
______pollution is the key to ____the country a comfortable and clean place to live in.
A.To control; keep B.To control;keeping C.Control;Keeping D.Controlling; keep.
我知道答案是B.
但是想问一下为什么是B以及其他选项为什么不对.谢谢高手指点.

一道高三英文选择题______pollution is the key to ____the country a comfortable and clean place to live in.A.To control; keep B.To control;keeping C.Control;Keeping D.Controlling; keep.我知道答案是B.但是想问一下为什么是B以
我觉得答案是D.
当动宾短语做主语的时候一般是用ing形式,所以第一个空应该填Controlling;第二个不定式短语应该用keep.