单项选择题

A．She isn’’t sure when Professor Bloom will be back.
B．The man shouldn’’t be late for his class.
C．The man can come back sometime later.
D．She can pass on the message for the man.
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单项选择题
According to the text, fossil studies of radiolaria are significant because they.
A．live in the depths of the ocean
B．are one-celled
C．have survived through the ages
D．demonstrates climatic changes prior to humans
单项选择题
The influence of business in the U.S. is evidenced by the fact that________.
A．most newspapers are run by big businesses
B．even public organizations concentrate on working for profits
C．Americans of all professions know how to do business
D．even arts and entertainment are regarded as business
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