九上U1T2SC.ppt

Section C
Unit 1 The Changing World
Topic 2 Which country has the
largest population?
8
88
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8,888
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8,888,888,888
88,888,888,888
888,888,888,888
Tongue twister
*What’s the population of the world / China / …?
*Which country has the largest population?
*The population in _________ (develop) countries is
larger and is growing ____ (slower / faster)
*The population problem is ____ (more serious / less
serious) in developing countries.
developing
Read Paragraph One and fill in the blanks
Asia had a population of _______________ in 2005. That’s to say, ______ of the world’s population live in Asia.
more than 3 billion
half
3 billion÷ billion≈1／2
(half)
50 percent (50%)
Almost half of the people in the world live in Asia.
billion÷ billion≈1 ／ 5
(one
20 percent (20%)
One fifth of the people in the world live in China.
fifth)
one sixth
one ninth
one twentieth
five sixths
two ninths
seven twentieths
attention
one (a) half
a quarter
three quarters
three and a half
Four fifths of the people in China ____ (be) farmers.
Three fourths of the boys _____(like) science.
Half of the rice _____ (go) bad, so we have to throw it away.
are
like
goes
分数做主语时，谓语动词的数要根据分数所指的词来确定。
Pre-reading questions
What problems does a large population cause？