( )------_____does he help his mother _____housework?------Twice a week

题目

( )------_____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

答案

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 ...