新概念二册52
问题描述：
新概念二册52
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)
答
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 fl...