How many are there in your family?A. peopleB. personC. peoplesD. member

问题补充：

How many are there in your family?

A. people

B. person

C. peoples

D. member

答案：

(答案→)A. people

B. person

C. peoples

D. member

解析：句意：你家有多少口人？people人，为单复数同行的可数名词，不加s. How many修饰可数名词的复数形式，故选A