单项选择题

A．Yes, I need a cup of coffee.
B．Please be helpful.
C．I can help.
D．Yes, I do.
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单项选择题
______ is the best title for this article.
A．The Most Popular Dishes in Mexican Cuisine
B．A Guide to Preparing Mexican Cuisine
C．The Puzzling History of Mexican Cuisine
D．An Introduction to Mexican Cuisine
单项选择题
Over forty percent of all plant and animal species on the earth live in ______.
A．the sea
B．the rainforests
C．the grassland
D．the desert
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