单项选择题

The amount of oxygen an animal uses depends on ______.

A．the length of time it lives
B．the food it eats
C．its size and shape
D．the heat the body produces
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单项选择题
Why is lightweight luggage important for a traveling businesswoman
A．It allows to be moved easily.
B．It can keep most needed papers.
C．It provides space for dirty clothes.
D．It is big enough to carry business papers.
单项选择题
Which of the following can be inferred from the passage
A．A greater percentage of women are advancing professionally in the U. S. than before.
B．Business women become successful by showing a willingness to travel alohe.
C．Each year there are more and more American female tourists traveling abroad.
D．Professional men refuse to go with their female tourists traveling abroad.
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