1. My father often talks about the __________________ of studying and hard work. (important)
2. The shoes were very nice, but they were__________________. (comfort)
3. Travelling in big cities is becoming more __________________ every day. (trouble)
4. He’s __________________ small for his age. (surprising)
5. In some areas water had to be boiled to __________________ it. (pure)
6. He’s an __________________ child who likes telling stories. (imagine)
7. The weather was terrible, so we had a very__________________ holiday. (please)
8. We were impressed by their__________________. (perform)
9. We are trying to save rare animals from __________________ . (extinct)
10. Many efforts have been made to protect __________________ animals and plants. (danger)