He reads newspapers every day to keep himself _______ about what's going on in the world.
Due to Tom’s joke, the discussion __________and went on in a friendly atmosphere(气氛)。
If you _______ the medicine, you _______ better now.
Women may have six months _______ after they give birth to a baby.
If your mother doesn’t agree, there is nothing you can do____than stay at home.
Half of them,____ is 50, can speak fluent Chinese.