单项选择题

To have a computer without being connected to the Web is like having an old radio when everybody else has a color TV. That helps explain ______ businesses are setting up Net sites even though profits are nowhere to see.

A. reasons
B. the reason why
C. why that
D. why
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单项选择题
Which of the following is the best title for the passage
A．Metropolitan Statistical Areas.
B．Types of Population Centers.
C．The Bureau of the Census.
D．Megapolises,
单项选择题
What does the professor mean when he says this So, baby Mary died at birth, and then another baby Mary came along who survived. Both go into the record books
A．Two people referred to the record book.
B．Even names are not as reliable.
C．Two copies of the record book were made.
D．Two names were recorded in the record book.
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