I. Điền tính từ thích hợp vào chỗ trống. Important kind painful healthy scared serious nervous worried 1. She is very _____ kind ______ . She always helps everyone. 2. Clean teeth are _____ healthy ______ teeth! 3. It's ______ important ________to brush your teeth regularly. 4. Most students feel ______ nervous _________ before the exams. 5. She's always _______ worried _______ about her children. 6. Is your decaying tooth very_______ painful_____ ? 7. The cavity isn't _____ serious ______ because it's small. 8. I'm _____ scared ____ to go out alone at night