We should brush our teeth twice every day.对划线部分提问（twice every day）____ ___ ____we brush our teeth?三个空
问题描述：
We should brush our teeth twice every day.对划线部分提问（twice every day）
____ ___ ____we brush our teeth?三个空
答
How many times do we brush our teeth?
答
HOW often do
答
【How often should 】we brush our teeth?