I failed my test.I am very upset and don't know 这是前提1.how to do i_英语解答

I failed my test.I am very upset and don't know 这是前提
1.how to do it2.what to do it3.how to do 4.what i should i do 最好选哪个

人气：173 ℃　时间：2019-10-11 05:07:24

解答

选1
2是错误的,应该把it去掉
3也是错误的,应该在后面加上it
4一看就是错的