单项选择题

Questions 17～20 are based on the following passage about the meaning of a satisfactory standard of living. You now have 20 seconds to read the questions 17～20. "Shelter" refers to

A．safe.
B．shell.
C．house.
D．income.
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单项选择题
Which title best gives the ideas of the passage
A．Americans Like Reading.
B．"How To" Book, A True Friend.
C．"How To" Book Is Popular.
D．Americans Like Books.
填空题
exciting and fulfilling
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