And too many people in a small place make 18 hard to keep theciti_英语解答

And too many people in a small place make 18 hard to keep thecities safe and clean.
And too many people in a small place make 18 hard to keep thecities safe and clean.Yet quiet a lot of people still 19 living in big cities.
18.A it B them Cthis Dthat
19A suggest Benjoy Cfinish Davoid

人气：225 ℃　时间：2020-02-02 15:25:54

解答

18 A
19 B
it 是形式主语,真正的主语是to keep thecities safe and clean；
enjoy doing 享受；喜欢做某事