AIDS is said ______ the biggest health challenge to both men and women in that area over the past few years.
Tom, you________leave all your clothes on the floor like this!
There________be something wrong with my computer.
We thought of selling this old furniture, but we've decided to________it. It might be valuable.
The company is starting a new advertising campaign to________new customers to its stores.
In the keen competition of this international tennis tournament, she________won the championship.