1. A. at B. in C. to D. of
2. A. There B. They C. That D. This
3. A. to climb B. climb C. climbing D. climbed
4. A. see B. saw C. seen D. seeing
5. A. throw B. threw C. thrown D. throwing
6. A. to protect B. protect C. protected D. protecting
7. A. to throw B. throw C. throwing D. thrown
8. A. is B. are C. was D. were
9. A. tradition B. traditional C. traditionally D. traditions
10. A. good B. well C. better D. best
Hồi nãy giờ gặp 3 câu như này rồi á :)))