单项选择题

A．A fuel that burns cleanly.
B．An oil additive that helps cool engines.
C．A material from which filters are made.
D．An insulating material sprayed on engine parts.
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单项选择题
A．Her car is being repaired.B．She wants to help reduce pollution.C．Parking is difficult in the city.D．The cost of fuel has increased.
A．Her car is being repaired.
B．She wants to help reduce pollution.
C．Parking is difficult in the city.
D．The cost of fuel has increased.
单项选择题
A．Whether the woman needs his help.B．Whether the woman has any pets.C．Where the woman is going.D．Whether the woman can take care of his pet.
A．Whether the woman needs his help.
B．Whether the woman has any pets.
C．Where the woman is going.
D．Whether the woman can take care of his pet.
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