问题
选择题
—__________ do you go to the cinema?
—Once a month.
A．How long
B．How many
C．How much
D．How often
答案
答案：D
题目分析：A. How long多长； B. How many 多少，提问可数名词数量；C. How much多少，提问不可数名词数量；D. How often多久一次，提问频率，根据答语 Once a month.（一月一次）可知问句是问多久一次，故选D。