Two thousand years ago, there were only 250 million people 3 the earth. Four hundred years ago, the number was 4 500 million. But at the beginning of the 5 century, the world's population was about 1, 700 million．In 1970, this number was 3,600 million．In 1990, the number was five billion．A 6 report says that the world population will 7 six billion by the end of the 20th century. This is just ten 8 after it 9 five billion. People say that by the year 2010, 10 may be seven billion．( )1.

( )1.

A. great

B. greater

C. greatest

D. greating

( )2.

A. faster and faster

B. fast and fast

C. fastest and fastest

D. faster and fast

( )3.

A. in

B. on

C. at

D. for

( )4.

A. nearly

B. more

C. almost

D. over

( )5.

A. twenty

B. twelve

C. twentieth

D. twelfth

( )6.

A. USA

B. UN

C. PRC

D. PLA

( )7.

A. past

B. pass

C. passed

D. passes

( )8.

A. weeks

B. months

C. seasons

D. years

( )9.

A. get

B. gets

C. reached

D. reach

( )10.

A. this

B. its

C. one

D. it

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