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单项选择题


A．The classroom was under construction.
B．He couldn’t focus on the class due to the noise.
C．He felt that his studying was not effective.
D．He went back to get the book left at home.
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单项选择题A．The long wait.B．The mistakes in her telephone bill.C．The broken-down computer.D．The bad telephone service.

A．The long wait.
B．The mistakes in her telephone bill.
C．The broken-down computer.
D．The bad telephone service.

单项选择题A．New foods to try when traveling.B．Making reservations for the best travel.C．Avoiding gaining weight while traveling.D．Adjusting to time changes when traveling

A．New foods to try when traveling.
B．Making reservations for the best travel.
C．Avoiding gaining weight while traveling.
D．Adjusting to time changes when traveling