―Who is making so much noise in the garden? ― the children.A. It isB. They areC. That isD.

问题补充：

―Who is making so much noise in the garden?

― the children.

A. It is

B. They are

C. That is

D. There are

答案：

(答案→)A. It is

B. They are

C. That is

D. There are

解析：原句意思是：谁在花园里弄出这么大的噪音？是孩子们. 此处it 指的是发出的噪音。不用they.根据文意,可知选A.