What is the "lead" in a pencil made of.'？
A. Diamond.
B. Carbon.
C. Lead.
D. Graphite.
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听力原文：W: Did you say yon' re going to take a vacation next week？
M: Yes. I' m going to San Francisco for a couple of weeks.
W: I envy you. I wish I could get away for a while.
What can you infer from the woman' s words？
A. She will soon take a vacation.
B. She is dying for a vacation.
C. She wants to be with the man.
D. She is jealous of the man' s working ability.
What is in great demand in factories？
A. Diamonds.
B. Diamond dust.
C. Big diamond stones.
D. Hard steel.
Which of the following is true in describing the black walnut tree？
A. The black walnut tree is valued for its nuts.
B. The black walnut tree is famous for its size.
C. Every walnut tree is highly valuable and profitable.
D. A single black walnut tree was once sold for $11,000.
What sort of restaurant is the woman looking for？
A. One that is relatively inexpensive.
B. One that is not very crowded.
C. One that offers large servings.
D. One that is situated close to her hotel.
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