DON'T WORRY! THE TRAIN WILL BE ARRIVED SOON. A B...

Câu 4: Don't worry! The train will be arrived soon. A B C DChọn đáp án đúng nhất để hoàn thành đoạn văn sau.Rivers are one of the world’s most important (5) ………….. resources. Many cities are on large rivers andalmost every country (6) ………… at least one river that plays an important part in the lives of its people.Besides transportation, rivers (7) ……….. people with food and water. To get water for crops, a (8) …….…is built across a river. People can use water not only to irrigate but also to make electricity.However, several rivers are polluted when industries develop. It is necessary to keep rivers (9) ………… ifpeople want to get benefits of the natural resources.