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the best answer for each of the following
Read the following passage and choose the letter A, B, C, or D to indicate the
rrect word or phrase that best fits each of the numbered blanks.
Different kinds of animals have appeared and disappeared throughout Earth's history.
Some animals
may become wetter or drier, It may become warmer or cooler. If the animals cannot
change, or adapt, to the new climate, they die.
go extinct because the climate (1) they live changes. The climate
Some animals go extinct because they cannot (2)
with other animals for food.
Some animals go extinct because they are killed by enemies. New kinds of animals are
always evolving. Evolving means that the animals are changing (3)__from generation
to generation. Small differences between parents, children, and grandchildren slowly
odd up over many, many generations. Eventually, a different kind of animal evolves.
time. Scientists
Sometimes many of the animals on Earth go extinct at the (4)
call this a mass extinction. Scientists think there (5)
Earth's history. The last mass extinction happened about 65 million years ago. This mas
extinction killed off the dinosaurs.
at least five mass extinctions in
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C. what
D. when
1. A. which
B. where
D. exist
2. A. compete
C. complete
B. find
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D. accidentally
3. A. suddenly
C. slowly
B. quickly
D. same
C. similar
C. have been
4. A. different
B. various
D. has been
5. A. will be
B. are
the best answer for each of the follow