I think it is impossible to finish the work in five days.为什么不能把it_英语解答

I think it is impossible to finish the work in five days.为什么不能把it换成this或that

人气：374 ℃　时间：2020-03-22 10:13:38

解答

宾语从句啊!it 是做宾语的,不能换做this ,因为this和that不能用作宾语从句里.