单项选择题

A．Economical fuel.
B．A new kind of fuel.
C．Energy saving.
D．Air pollution.
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单项选择题
A．Advantages and disadvantages of freezers.B．The best energy-efficient freezer.C．Defrosting a manual defrost freezer.D．Choosing and caring for a freezer.
A．Advantages and disadvantages of freezers.
B．The best energy-efficient freezer.
C．Defrosting a manual defrost freezer.
D．Choosing and caring for a freezer.
单项选择题
A．A doctor.B．A repairman.C．A police officer.D．An actress.
A．A doctor.
B．A repairman.
C．A police officer.
D．An actress.
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