Task 1. Read the following paragraph and complete it with one suitable word. (Đọc đoạn văn sau và điền vào chỗ trống một từ thích hợp )

Task 2. Choose the correct word by underlining it at each number in the following paragraph, then answer the questions.

(Chọn từ đúng bằng cách gạch chân từ đó, sau đó trả lời các câu hỏi.)

A plastic problem

Nowadays, people use a lot of plastic bags and they often (1) throw away / bury the bags afterwards. They don't often (2) pollute / reuse or (3) waste / recycle them. When we (4) destroy / reuse plastic, we pollute the lands or air. It isn't a good idea to (5) burn / poison plastic because it (6) poisons / saves the atmosphere. The alternative is to (7) bury / pollute it, but some plastic doesn't decompose for over a thousand years.

Task 3. Choose the correct word A, B or C for each gap to complete the following passage.
 (Chọn đáp án đúng để điền vào chỗ trống trong đoạn văn)

Rivers are (1)______ of the world's most important natural resources. Many cities are on large rivers, and (2)_____ every country has at least one river that (3)______ an important part in the lives of its people. Besides transportation, rivers (4)______ food, water for crops, water to drink, and opportunities for recreation for people who live along their (5)_____. And in order to get water for crops, engineers sometimes build a dam across a river and let the water become a lake (6)_____ the dam. Then people can use their water not only to (7) _____ fields but also to make electricity for homes and industries. (8), the water often becomes polluted when cities on river banks grow (9) size and the number of industries increases. We are learning that it is necessary to (10) rivers clean if we want to enjoy the benefits of the natural resources.