问题
选择题
--- How ________ do you attend the evening classes?
--- _______, three times per week.
A．long; On the whole
B．often; On average
C．soon; Generally speaking
D．much; In all
答案
答案：B
情景交际。根据下文答语，three times per week一周三次，可知上文问的是频度，故选B。