Page 143 - Grammar Explorer 2 - demo

2. The Aral Sea is smaller now because of .
a. high temperatures b. agricultural projects c. building projects

3. The dam in Kazakhstan helped the .

a. northern Aral Sea b. southern Aral Sea c. entire Aral Sea

3 DISCOVER. Complete the exercises to learn about the grammar in this lesson.
A Look at these sentences from the lecture in exercise 1. Notice the words in bold. Then
choose the correct answers for the questions that follow.

Most of the water has disappeared.
The water level has risen.
Birds have returned.

1. Which statement is true for all three sentences?
a. The actions happened at some time in the past.

b. The actions are happening now.
c. The actions will happen at some time in the future.

2. Do we know the exact time of the actions or events in these sentences? a. Yes b. No

B Discuss your answers from exercise A with your classmates and teacher.

The Aral Sea has dried up and
left behind ships like this one.

UNIT 5 LeSSON 1 123
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51106_GE2_U05_120-155_rev06.indd 123 8/13/14 6:16 PM