单项选择题

A．A new fuel for buses.
B．The causes of air pollution.
C．A way to improve fuel efficiency in buses.
D．Careers in environmental engineering.
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单项选择题
Lance Bass wasn’’t able to go on a tour of space because of health problems.
A．Y
B．N
C．NG
单项选择题
A．Looking for a new job.B．Taking a suburban excursion.C．Looking for an apartment.D．Asking the man to do her a favor.
A．Looking for a new job.
B．Taking a suburban excursion.
C．Looking for an apartment.
D．Asking the man to do her a favor.
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