To do some voluntary work for the 2nd Youth Olympic Games is ______ excellent chance for us to serve our hometown—Nanjing.
He is _______fat because he eats _________junk food.
-_______are you going for vacation?-I am going to Canada.
-What does she do on weekends?-She ______goes to the movies.
-Can you come to play with us?-Sorry,I ________.
An apple a day is good _______ your health.