Jane and I twelve. My sister ten.A. is isB. is areC. are isD. are are

问题补充：

Jane and I twelve. My sister ten.

A. is , is

B. is , are

C. are , is

D. are , are

答案：

A. is , is

B. is , are

(答案→)C. are , is

D. are , are

解析：简和我12岁了。我的妹妹十岁。结合语境可知前文为and连接的两个并列主语，故谓语动词用复数形式，下文主语my sister为单数形式，故谓语动词用单数，选C。