If we did not use alternative sources of energy more, we would destroy the planet.
Đáp án đúng là: B
Viết lại câu bằng cách đổi cấu trúc câu (chủ động → bị động)
Dịch: Nếu chúng ta không sử dụng các nguồn năng lượng thay thế nhiều hơn, chúng ta sẽ phá hủy hành tinh.
It is compulsory for the tourists to learn about the vital eco-systems before arriving.
You stay in locally owned accommodation and buy products from local people. You will support local community.
You should try to limit the use of natural resources. They are running out in many tourist destinations.
If you must, travel by plane. If you can avoid it, try a train instead.
Our aim is to provide tourists with the principles of ecotourism throughout their trip.
Eco-travellers have to prevent or minimize any negative impacts on the environment.
We don't allow the local people to hunt endangered species for our consumption. They will become extinct sooner.