Did you and your brother do any housework at home last weekend， Sally—________did， because we went out for a trip with our parents.

What troubled the teacher was that no one present madean answer when asked who had broken the glasses, so he didn’t know who_____________.

I can think of many cases ______ students can’t write a good article though having a large vocabulary.

I used to go to sleep ________ my bedroom light________.

Having ________ exercise every day will do great good to your health.