1. What is the environmental pollution? 2. What should people do to protect environment? 3. Do you know how many English speaking countries in the word? 4 Which are they? 5. Have you ever campted in an international summer camp? 6. Where did you camp in your international summer camp? 7.Did you speaking English with local people there? 8. Do/did you have difficulty understanding them? Trả lời ngắn gọn

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