The air in Dongying is much worse than that in many other cities. We must do to protect our environment.
--_______do you eat junk food?----Twice a week.
—You look sad. What has happened? --Everyone ____us ____the match, but we lost .
He can speak ____ Japanese .
May I ask you ____ questions?
-How long may I ______ your book? -For one week ,But you can’t____ it to others .