—Are those boys your friends ?— A. Yes those areB. Yes they areC. Yes they aren’tD. N

问题补充：

—Are those boys your friends ?

—

A. Yes , those are

B. Yes ,they are

C. Yes , they aren’t

D. No, they are

答案：

A. Yes , those are

(答案→)B. Yes ,they are

C. Yes , they aren’t

D. No, they are

解析：固定短语are these…?的肯定性答语是yes，they are。否定性答语是no,they aren’t.故选B.