单项选择题

The only remaining 18% of Costa Rican lowland forests in the early 1990s led to ______.

A．high up pastures
B．moist air
C．a warmer atmosphere
D．clouds' condensation
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单项选择题
According to the passage, the great development of Turnitin is due to ______.
A．its superb management
B．the thriving of academic cheating
C．its big electronic eye
D．the test of its software by the Joint Information Systems Committee
单项选择题
According to the passage, the author's attitude towards Turnitin's anti-plagiarism software may be said to be ______.
A．doubtful
B．indifferent
C．objective
D．favorable
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