Cathy spent a lot of money onher son’s study.

This term all the teachers in Xinghua are thinking about ___________ to make the students learn better by changing their teaching ways.

Mrs. Green has been living ___ for two years. But she doesn’t feel ___ because she has many friends.

The population of the two villages less than two million in 1999.

Barack Hussein Obama, the present president of the USA, ________ a naughty (调皮的) boy at school.