WORLD POPULATIONA. PRONUNCIATIONI. CHOOSE THE WORD WHOSE UNDERLINED PA...

20) “Did you need help with your math last night?” “If I had needed, I ____ you”.

A. would call B. called C. would have called D. will call

C. READING

Read the passage and choose one correct answer for each question.

The world’s population increased from 3 billion in 1950 to 6 billion by 1999, a

doubling that occurred over 40 years. The Census Bureau’s latest projections imply

that population growth will continue into the 21

^st

century, although more slowly. The

world’s population is projected to grow from 6 billion in 1999 to 9 billion by 2042,

an increase of 50 percent that will require 43 years.

The world’s population growth rate rose from about 1.5 percent per year from

1950 to 1951 to a peak of over 2 percent in the early 1960s due to reductions in

mortality. Growth rates thereafter started to decline due to rising age at marriage as

well as increasing availability and use of effective contraceptive methods. Note that

changes in population growth have not been steady. A dip in the growth rate from