下面短文中,每一行均有一个错误,看谁的眼睛好,能很快找出错误。
Mr Green come from England . ____
He teaches English in middle school . ____
He can speak any Chinese. ____
She goes to Chinese classes very week . ____
He likes working in Chinese very much . ____
根据给出的不同条件,分别列出算式,不计算,图书馆有文艺书400本,有科技书多少本?