★ TOEFL
The extinct Martian volcano Olympus Mons is approximately three times as _____________ Mount Everest.
A. high
B. high as is
C. higher than
D. the highest of
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______________provided a living for nearly 90 percent of the population of the American colonies.
A. Farming was what
B. What farming
C. Farming was
D. What was farming
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