单项选择题

A．Therefore
B．However
C．Moreover
D．Likewise
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单项选择题
What is the man surprised to learn？
A．That the library opens at 8:00.
B．That no one else had read the articles.
C．That none of the materials he needs is available.
D．That reserve materials can be taken out of the library.
单项选择题
What is the purpose of the tank test
A．To find out how much air can be pumped into a plane.
B．To find out how much air passengers need to breathe at certain altitudes.
C．To find what would happen if the plane crashed in the water.
D．To find out if there are any weak parts in the plane that would burst under pressure.
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