16.The number of deer,mountain lions and wild roses___ much if people leave things as they are.
问题描述：
16.The number of deer,mountain lions and wild roses___ much if people leave things as they are.
A.doesn't change B.don't chnge C.change D.changed 应该选什么
答
选a 单从语法角度就可以得出答案.句子是一般现在式,所以排除D.主语是number,应该用单三形式,所以排除b,c