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c. storms/happen more often _________________________________________?
d. less snow/fall in winter ___________________________________________?
e. summer/get hotter _______________________________________________ ?
f. the changes/become a problem ______________________________________?
g. people/worry about this ___________________________________________?
h. they/do anything to help __________________________________________ ?
6. Complete the text with the present simple or present continuous forms of the
verbs in brackets.
Population a (mean) means
the number of people who live in a particular area.
The population of the world b (not stay) _______________ the same. At the moment
it c (grow) __________________ at an increasing rate. In fact, scientists d (believe)
________________ that the world population will increase until 2200, and then stop
growing. However, things are not the same in all parts of the world. At present in
many Western industrial countries the population e (fall) ______________. This f
(happen)_______________ because families are small, and health conditions are
good. In developing countries, on the other hand, the population g (rise)
________________sharply. In Ghana, for example, most families h (have)
__________________ several children. Many children in Ghana
i (die) __________________ from illness, so it is important to have lots of children.
They earn money for the family and j (look after)_________________
their parents in old age.
7. Complete the sentence with the present simple or present continuous form of
the verb in brackets.
a. Everybody (know) knows
that the world's rainforests (disappear) are
disappearing.
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