UNIT 04 Wind

　　Wind helps people on Earth. Wind can make a lot of energy and so people can use it. Wind is the cheapest form of energy. Sometimes, it is dangerous, and sometimes it is not dangerous at all. It is renewable forever. How fast does the wind blow? Storm winds blow about 110 kilometers per hour. Breezes blow about 35.

　　Select True or False

　　❶ Wind is not renewable. (T/F)

　　❷ Wind is a kind of rain. (T/F)

　　❸ People use wind to make energy. (T/F)

　　More to know

　　per

　　per具有“每个；各个”等意思。一般在per的后面接单数名词。

　　··The movie is 5 dollars per person。

　　这部电影每个人收5美元。

　　··The bell rings three times per hour。

　　这个钟每小时响3次。

　　READING COMPREHENSION

　　*Read and circle the best answer。

　　❶ How fast do storm winds blow?

　　a. about 80 kilometers

　　b. about 110 kilometers

　　c. about 150 kilometers

　　❷ What can wind make?

　　a. energy b. water c. gas

　　*Complete the sentence with the right answer。

　　❸ Wind is 。

　　a. limited b. renewable c. useless

　　❹ Breezes blow about kilometers per hour。

　　a. 15 b. 35 c. 55

　　DESCRIBE THE PICTURE

　　*Circle the correct sentence。

　　❶ There is a wind power plant。

　　❷ There is a thermal power plant。

　　❸ There is a water power plant。