2. —What do you think is the biggest ________ of shopping websites?

—It’s convenient for us to shop online.

3. I can’t stand people who are ________ to animals. Instead, we should be kind to them.

4. — Tommy, do you often ________ things you don’t need anymore?

— No. Actually, they should be put into good use. Nothing is a waste if you have a creative mind.

6. Playing with cellphones in a dark room is ________ to our eyes. So we must develop a good habit of using our eyes.

7. I bought a new sweater last weekend. It ________ me 120 yuan.

8. The White House is the workplace which the ________ of America works in.

10. Many old trees and houses were ________ down by the terrible rainstorm last night.

11. The host opened the ________ and smilingly welcomed the travelers home.

48-year-old Shao Xiaobei is from Shaozhuangzi Village in Xiong’an New Area of Hebei Province. He often live-streams (直播) on a dock (码头) at Baiyangdian Lake. He used to be a(n)     12    , but now he has become an Internet host and local tour guide. He makes use     13     the beauty of Baiyangdian Lake to develop a tourism service. He not only shows his 6,000 fans the beauty of the lake by live-streaming but also takes tourists out on     14     wooden boat to show them around. He makes about 100,000 yuan every year and his life has changed a lot. Now he can     15     to buy a car and a big house.

Baiyangdian Lake covers an area of 366 square kilometers. It is known for its natural beauty, clean water and different kinds of animals. However, it was     16     by industrial and domestic (家庭的) wastewater in the past. What’s worse, people threw     17     into the lake. And many     18     products which can not be degraded could be seen in the lake. In recent years, the government has made new     19     and taken actions to clean it up. Some companies have been shut down and domestic (家用的) wastewater has been dealt with before it goes into the lake. Reusable waste has been     20    .

Shao Xiaobei would like to thank the government from the     21     of his heart for cleaning up the lake.