单项选择题

What is the author's purpose of referring to Sam's broken bicycle

A．To illustrate the ways to repair his bicycle.
B．To discuss the problems of his bicycle.
C．To tell us how to solve a problem.
D．To show us how to analyze a problem.

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单项选择题

Daily attendance is required__________.

A．at all American universities
B．only in elementary and high schools in America
C．for bad students only
D．by some college professors

单项选择题

Which one of the following statements is true according to the passage

A．You can get the latest information from the library.
B．There are few clerks in the library.
C．Libraries are out of date.
D．Schools should pay little attention to the size of their libraries.