Inside an aeroplane, flying at a high altitude…
A. The pressure is the same as it is outside
B. Normal atmospheric pressure is maintained by the use of air pumps
C. The pressure inside is less than the pressure outside
D. Normal humidity and partial vacuum are maintained
Select your answer:
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A. extraordinary
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What is the function of the gerund in this sentence?
Understanding algebra takes daily practice.
A. subject
B. direct object
C. predicate nominative
D. object of the preposition
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