B
根据短文内容,从方框内所给的 A、B、C、D、E 五个选项中,选出能填入空白处的最佳选项,使文章内容完整且符合逻辑。
The Horsetail Fall is one of Yosemite National Park's most amazing views. Around the second week of February, when conditions are right, the Horsetail Fall becomes orange and red at sunset. It is like red-hot lava（熔岩）pouring down from the top of the El Capitan.21.
The fire fall is a perfect match of the weather, the fall, the time and the watching place. It usually appears on dry, warm and cloudless days.22. So there must be enough snow on the mountain top, and it turns into water on warm afternoons.
23. And the best time to watch the fall is 5 to 15 minutes before the sunset.Only at this time can visitors see the fire fall.The El Capitan Picnic Area is close to the fall and is perfect to set up cameras and tents.24.
Every year in February, thousands of photographers come to watch the fire fall. Although the view may appear just minutes before sunset, many of them have to come hours earlier to get a right place to set their cameras in time.“25. It is such a great natural wonder,” says Kate Moor, a traveller and the lead content creator for ParkedInParadise.com.

三、补全对话。

21~25.ADECB

三、补全对话。
从下面的方框中选择合适的句子，填到横线上，使对话意思完整。
A: Hi, Sarah. I know you're interested in the wonders of nature. 26.
B: It is the Amazon Rainforest. Do you know how big it is?
A:27.
B: Where is it?
A:28. It crosses eight countries and most part of it is in Brazil.
B:29. Could you tell me anything more about it?
A: Of course. About 20% of the birds in the world live in it.
B:30.
A: But it is becoming smaller and smaller in size these years.
B:31.
A: Because people cut down lots of trees every year.
B: That's too bad.
A. So great.
B. It is in South America.
C. Oh, you know so much about it.
D. Why is it becoming smaller and smaller?
E. What's the biggest rainforest in the world?
F. Certainly, it is about 7 million square kilometres.

26~31.EFBCAD