Read the passage and choose the best answer:Within the last century the amount of carbon dioxide in the atmosphere (26)_______dramatically, largely (27)_______people burn vast amounts of fossil fuels, coal and petroleum and its derivatives. Average global temperature also has increased - by about 0.6 Celsius degree within (28)_______ past century.Atmospheric scientists (29)_______found that at least half of that temperature increase (30)_______attributed to human activity. They predict that (31)_______dramatic action is taken, global temperature will continue (32)_______by between 1o C and 3.5o C (between 1.8° and 6.3° F) over the next century. Although (33)_______increase may not seem like a great difference, during The Last Ice Age the global temperature (34)_______only 2.2 Celsius degrees cooler than it (35)_______presently.
Câu 1: ______(26)
A. has risen
B. rose
C. has raised
D. raised
Câu 2: _______(27)
A. because of
B. although
C. despite
D. because
Câu 3: _______(28)
A. a
B. some
C. the
D. any
Câu 4: ______(29)
A. had
B. have
C. are
D. ought to
Câu 5: ______(30)
A. should be
B. is being
C. had been
D. can be
Câu 6: _____(31)
A. unless
B. if
C. provided
D. as long as
Câu 7: _____(32)
A. be rising
B. to rise
C. to be risen
D. to be rising
Câu 8: ______(33)
A. so much
B. so
C. such an
D. such
Câu 9: ______(34)
A. had been
B. has been
C. is
D. was
Câu 10: ______(35)
A. is
B. has been
C. was
D. will be
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