Why do you call him Mr．Knowledgeable?— Because he knows almost everythingwe want to know．
When the traffic lights are red, we _______ stop.
The girl began learning the piano _______ the age of four. She is very good _______ it now. [ ]
We don’t like people _ talk too much but never do anything.
How’s your new babysitter? —- We ______ ask for a better one. All our kids love her so much.