- is your mother? She is 30.A. How aboutB. How muchC. How manyD. How old

问题补充：

--- is your mother? --- She is 30.

A. How about

B. How much

C. How many

D. How old

答案：

A. How about

B. How much

C. How many

(答案→)D. How old

解析：此题考查有关how的特殊疑问词的基本含义。How about意思怎样，常用来征求意见或提建议；how much常用来询问价格或不可数名词的量；how many用来询问可数名词的量；how old常用来询问年龄，意思多大了。根据答语she is 30可知，询问的是年龄，故选D。