问几道英语单选题答案已给出,请求分析!1.--Don't skate on the lake!--why not?Isn

问几道英语单选题
答案已给出,请求分析!
1.--Don't skate on the lake!
--why not?Isn't it thick enough __A____?
A.to skate B.to skate on
2.--There are two books on the shelf.One is in English,___A____is in Chinese.
A.the other B.an other(有可能是another,书上多了一个空格)
3.Lily is often heard _____B______ in her bedroom.
A.sings B.to sing
4.Either you or I______B_______going to attend the meeting.
A.is B.am
5.-- What are you doing now?Please join us in the game.
--Sorry,I am so busy now.If I_____A____time,I_______join you.
A.had;would B.have;would
6.The children___B.____in the hospital.
A.were taken good care B.were taken good care of
7.They don't know which room______B____.
A.to live B.to live in
8.--Do you think this book can be a suitbale present for my daughter?
--It's interesting.____A____it is easy enough for a six-year-old child to read.
A.But B.And