( ).____ do you write to your pen pal?Once a month.A.How B .How often C.How much D.How long
问题描述：
( ).____ do you write to your pen pal?Once a month.A.How B .How often C.How much D.How long
答
B .How often
答
B频率
答
b 表示频率的
a怎么，怎样 b多久 c 多少钱 d多少时间（指花费多久）
答
B
答
答案：B
根据答语“一个月一次”,前面应该是询问频率的,用how often.