Unit 1 Water Exercise 1 (Viewing and listening) I. Listen to the sentences and circle the words you hear. ( ) 1. A. real B. really C. rare ( ) 2. A. million B. billion C. trillion ( ) 3. A. safe B. safely C. save ( ) 4. A. west B. rest C. best ( ) 5. A. rock B. dock C. lock

II. Listen and choose the right picture. 1. 2. 3. 4.

III. Listen to the passage and complete the sentences. Fill in each blank with no more than three words. 1. We can live with no water for only ________. 2. Water can ________ our bodies and keep us healthy. 3. After playing outside or running around, drinking water ________ and makes us feel good. 4. It is advised that most of us drink ________ of water every day. 5. It is helpful to drink a glass of water, after getting up or one hour ________.

IV. Choose the best answer. ( ) 1. Which of the following underlined parts is different in pronunciation from the others? A. manage B. safely C. factory D. satisfy ( ) 2. Water covers a large proportion of ________ Earth's surface. A. a B. an C. the D. / ( ) 3. The mountain is covered ________ snow all year round. A. from B. in C. with D. at ( ) 4. Kate gave her friends some cookies and kept ________ for herself. A. the rest B. the other C. another D. others ( ) 5. Tom forgot to turn off the tap, ________ the water running all night. A. left B. leaves C. to leave D. leaving

V. Complete the sentences with the given words in their proper forms.
1. The big ________ are trying to stay alive by cutting costs. (factory)
2. The soup was so ________ that it made her thirsty. (salt)
3. We are warned that this area is ________ and dangerous to enter. (pollution)