| A | B |
|---|
| cavity | a hole in a tooth |
| dentist | a doctor who cleans and fixes teeth |
| filling | metal or other material used to fill a cavity |
| invader | a person who enters a country to attack it or steal |
| invasion | the name of the event when someone enters a country by force |
| launch | to send into the air by force |
| receive | to get |
| spaceman | a man who comes from another planet |
| station | place that sends out radio signals |
| stay tuned | stay on the same radio station |
