— does your school have the parents’ meeting?— Twice a year.A. How often B. How longC. Ho

问题补充：

— does your school have the parents’ meeting?

— Twice a year.

A. How often

B. How long

C. How many

D. How much

答案：

(答案→)A. How often

B. How long

C. How many

D. How much

解析：A. How often多久一次，表频率 B. How long多长时间，长度 C. How many多少，修饰可数名词的复数 D. How much多少，修饰不可数名词；句意：你的学校多久开一次家长会。一年两次。故选A