Page 148 - Grammar Explorer 2 - demo

PRACTICE

11 WRITE & SPEAK.

A Complete each sentence with the words in parentheses. Use the present perfect.

A polar bear stands on
an ice floe, Svalbard,
Norway.

Fast Facts about Climate Change

1. In recent years the population of the Earth has grown to over seven billion .
(the population of the Earth / grow / to over seven billion)

2. In the last 200 years, .

. (human activity / cause / changes in the climate)
3. by 1.4 degrees Fahrenheit

(0.8 degrees Celsius) since 1880. (average temperatures / rise)

4. ,
according to NASA. (most of this increase / happen / recently)
1
5. faster than the global
average. (temperatures in the Arctic / increase)

6. at the Poles.
(the ice / begin to melt)

7. around the world.

(sea levels / rise)
8.

and many types of animals. (climate change / already / affect / many groups of people)

1 NASA: National Aeronautics and Space Administration

128 The PReSeNT PeRFeCT
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