( )------_____does he help his mother _____housework?------Twice a weekA.How long;of B.How often;with C.How often;doing D.How long;do
问题描述：
( )------_____does he help his mother _____housework?------Twice a week
A.How long;of B.How often;with C.How often;doing D.How long;do
答
B,
后面回答说两周一次，表示问的是频率，所以排除A, D；
help sb. with sth. 或 help sb. do sth.所以选 B
答
选择B------【How often】does he help his mother 【with】housework?------Twice a week他多长时间帮妈妈做一次家务?一周两次how often是对频率提问的,“多久一次”“隔多长时间一次”how long是对时间段提问help ...