supply the correct form of the words in the brackets to complete the sentences below.
1. He fell off his bike, but his . . . were not serious. (injure)
2. The shop . . . showed me a lot of new models. (assist)
3. You shouldn't talk about her characters only through her . . . (appear)
4. She felt alone and . . .(friend)
5. We need to get more young people . . . in the sport. (interest)
6. The knife is . . . , it can't cut anything. (use)
7. Bell . . . demonstrated his invention. (success)
8. . . . the barber cut my hair too short. (luck)
9. Nam is very . . .kind and generous. (social)
10. You can't predict the weather here. It is very . . .(change)