1. He likes to watch the stars in the sky at a peaceful (宁静的)night.
2. Jack is rich, but he is very mean (吝啬的). He never lends his money to others.
3. As a student, John is very active (活跃的, 积极的)in class. For example, he often answers teachers’ questions.
4. He said he would devote (奉献)all his life to the research.
5. We must follow the principle (原则) that education should be fair to everyone.
