* Loại dấu trọng âm :
1. A. Collect B. Nursing C. Donate D. Exchange
2. A. Tutor B. Homeless C. Elderly D. Community
3. A. Provide B. Litter C. Water D. Garden
4. A. Children B. Protect C. Village D. Paper
5.A. Summer B. Vegetables C. Yesterday D. Fantastic
6.A. Volunteer B. Plastic C. Playground D. Sunday
7.A. Activity B. Recycle C. Bottles D. Donate
8.A. Student B. Provide C. Primary D. Children
9.A. Enjoy B. Healthy C. Dirty D. Sunburn
10.A. Harmful B. Condition C. Weather D. Exercise