Complete each sentence with the correct form of a word from exercise A. Then listen and check your answers. 1. Ancient people didn't have metal. They used __________ tools for farming and hunting. 2. This wall has a __________ in it. I can see light coming in from outside. 3. Sophie can't swim very well, so she won't go into __________ water. 4. A __________ knife can cut into an apple very easily. 5. After it rains, small streams of water come together and __________ a river. 6. I almost never eat sweets, so chocolate is a __________ treat for me. 7. If you put sugar in a cup of coffee, it will __________. 8. This mountain used to be much higher, but wind and rain have __________ it. 9. He's new at this job, but customers don't seem to notice his __________ of experience. 10. Most of the farmers wear hats to __________ themselves from the sun.