单项选择题

Which of the following is the most appropriate title for the passage

A．The Communal Life of Bees
B．The Structure of the Bees
C．The Organization of Insect Colonies
D．The Life of Social Insects
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单项选择题
Hydrogen ______.
A．is a widely-used fuel
B．is not yet in general use as a fuel
C．is not a particularly easy fuel to store
D．is a more economical fuel than wind energy
单项选择题
What do I' mean as high praise (Line 8, Para. 2)
A．Lincoln was a decent man, a good politician, and a great President.
B．Lincoln belonged in the pantheon of the gods.
C．Lincoln was the best kind of ordinary man.
D．Lincoln was a good man.
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