Ⅰ. Fill in the blanks according to the given tips, using their proper form.
1. It’s _____(believe) for us to learn English so well in such a short time.
2. My teacher always encourages us _____(work) hard and never give up.
3. My parents hope to live in a _____(peace) village when they're older.
4. Last week I had an _____(usual) experience in Chengdu.
5. The fast food _____(it) isn't bad for our health, but eating too much is bad for us.
6 . At the Night Safari, you can watch these animals in a _____(nature) environment.
