单项选择题

He’s color-blind and can’t （） between red and green easily.

A． detect
B．discover
C．distinguish
D． determine

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问答题
In an essay entitled Reflection on Plagiarism, you are expected to make your comments on this issue in about 250 words.
单项选择题
The word melancholy in paragraph 3 probably means （）.

A. joy
B. sadness
C. hysteria
D. exhilaration
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