根据句意、汉语、单词或首字母提示写出单词。
1. Mille is writing a r________ on wild animals in danger these days.
2. If we don't protect the wetlands, it will be i________ to see the rare animals in the future.
3. People who have no sense of d________ often get lost in big cities.
4. Can you answer the _________ (下列) question?
5. The students are doing their homework ________ (安静) in the classroom.
6. A young boy ________ (fall) off the tree and hurt his legs.
7. Teachers should encourage their students _________ (study) hard.
8. We ________ (get) orange if we ________ (mix) red with yellow.
9. ________ (step) on the snakes is very dangerous for people.
10. I will try my best ________ (learn) English well next term.
