Our classroom very big and clean. We enjoy studying there.A. amB. isC. areD. be

问题补充：

Our classroom very big and clean. We enjoy studying there.

A. am

B. is

C. are

D. be

答案：

A. am

(答案→)B. is

C. are

D. be

解析：系动词Be(am, is, are)的用法

请记住以下口诀：

我用am，你用are，is连着他，她，它；

单数名词用is，复数名词全用are。

主语classroom为第三人称单数,所以用is.