Do you want to be healthy? ______. Smiling can help you stay healthy.

My uncle _____ Beijing next week. He is having a meeting there.

Where do you often exercise?—I often exercise in the park. It’s close to my house.[ ]

It’s generous _______ them to donate money to UNICEF.They think it important ______ them to help poorchildren go to school. [ ]

You had better finish _______ your homework.