【开放英语4(英语II(2))-1162网上形考机考题库】 Both the kids and their parents _____English, I think. I know it from their accent.

【开放英语4(英语II(2))-1162网上形考机考题库】 Both the kids and their parents _____English, I think. I know it from their accent.
A. is
B. been
C. are
D. was