Reading scientific books is one of my interests. => I'm . (Miễn phí)

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

Tìm lỗi sai: In contrast đồ sộ my brother is hardworking, I am quite a lazy boy.

Villagers are more kind, friendly and warm-hearted kêu ca city _______.

A. dwellers 

B. foreigners

C. beginners

D. movers

Immediately after his appointment đồ sộ the post, the new editor fell ill.

=> No sooner ___.

She put ______ speaking đồ sộ him as long as possible.

A. off

B. over

C. away

D. back

When did you first know him?

=> How long ______?