单项选择题

Who is the woman probably speaking to（）

A．A car dealer.
B．A mechanic.
C．A driving examiner.
D．A technical consultant.

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单项选择题
How much of the power consumed by incandescent bulbs is converted into light（）

A．A small portion.
B．Some 40 percent.
C．Almost half.
D．75 to 80 percent.
单项选择题
What do we learn about Sally from the conversation（）

A．She enjoys making up stories about other people.
B．She can never keep anything to herself for long.
C．She is eager to share news with the woman.
D．She is the best informed woman in town.
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