Question

that 和 it 代不可数名词区别在哪里

Answer 1

D

life in the twenty-first centry is much easier than it used to be.

life in the twenty-first centry is much easier than that in the twentieth.

原因我说不上来,只是感觉,但是不会错.以上两句你比较,都是正确的句子.

English can be learnt.It cannot be studied.