1. I like those students who are careful with their lessons , _________ (例如) Mary , Linda.
2. ( 事实上 ) ________ , the accident caused great damage and a loss of 2 lives.
3. Traveling by train , we visited __________ ( 大量， 许多) cities.
4. Nowadays , the ____________ ( 受过良好教育的) people have more chances to get employed.
5. She always ____________ ( 积极参加) all kinds of activities when she was at school.
6. China ____________ ( 起重要作用 ) international relations.
