单项选择题

A．Supply their own light.
B．Locate food and enemies.
C．Compensate for the lack of light.
D．Both B and C.
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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.
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.
单项选择题
A．Their parents cut back loan.B．The woman doesn’’t want Prank to take another English course.C．They can’’t pay the rent this month.D．The woman’’s boss refused to give her a raise.
A．Their parents cut back loan.
B．The woman doesn’’t want Prank to take another English course.
C．They can’’t pay the rent this month.
D．The woman’’s boss refused to give her a raise.
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