–Is your family photo?--Yes are my parents. A. this; thisB. these; thisC. this; these D.

问题补充：

–Is your family photo?

--Yes, are my parents.

A. this; this

B. these; this

C. this; these

D. that; that

答案：

A. this; this

B. these; this

(答案→)C. this; these

D. that; that

解析：句意：这是你的全家照吗？是的，他们是我的父母。your family photo为单数，所以主语也应该用单数，第二句中的谓语又是复数形式，所以主语应该用复数，故选C。