—____ is Mary？
—She is five.
A. Who B. What C. How old
The government ______ these people ______ money．
A. provides; for B. provides; with C.provides; of
He likes meat she likes vegetables.
A. so B .while C. or
Air pollution does harm to people’s health.
A. very B. little C. great
.I'm sorry you've missed the train .It _______ for 10 minutes .
A. has left B. has been away from C.has been away
---- What are you going to do this weekend ?
---- I'm going to do some outdoor activities _______ it rains .
A. If B. unless C. because