----- Nội dung ảnh ----- VII. Supply the correct form of the verbs in brackets.
1. I can’t believe she ____(not book) her flight for the summer vacation yet. 2. They ____(do) community service in their neighbourhood every June. 3. Mount Everest is the most challenging mountain I ____(ever, climb).
4. Last year, we ____(explore) the savanna of Africa on a jeep tour. 5. How many eco-tours ____(you, take) for the past three years? 6. I hope my best friend and I ____(not argue) during our field trip. 7. Peter ____(injure) his hand while he ____(attend) an army course. 8. The tour guide ____(help) us a lot since we ____(arrive) in Paris. 9. My flight ____(be) tomorrow so at present I ____(pack) my clothes. 10. Carla usually ____(visit) Australia in the summer, but she ____(never go) snorkelling to see the coral reefs. 11. ____(you/ ever/ be) to Japan? – No, I ____(not be) to Japan yet. 12. How long ____(Mrs Grey/ teach) in this school? – She ____(start) teaching here two years ago. 13. She ____(have) a breakthrough in her research some years ago, and since then she ____(be) very successful.