题目

新概念二册52课
将答案用括号的词连起.
Why has this proved difficult?Do they cover every inch of floor space at the moment or not?(because.which)

提问时间：2020-09-16

答案

It is difficult to clean up the new room because the authour own over a thousand books,which should be put in a very small room.The author have to walk on the books because they cover every inch of floor space which surprises the author's sister a lot.