---Is she your mum Helen?---.A. Yes it is.B. Yes she is.C. Yes he is.D. No she is.

问题补充：

---Is she your mum, Helen?

---.

A. Yes, it is.

B. Yes, she is.

C. Yes, he is.

D. No, she is.

答案：

A. Yes, it is.

(答案→)B. Yes, she is.

C. Yes, he is.

D. No, she is.

解析：

试题分析:此题考查一般疑问句的简略回答，因此句的主语是she，故简略回答是yes，she is。否定性回答是no，she isn’t。故选B。