单项选择题

A．Approach the problem in a logical fashion.
B．Time how long it takes to solve the problem.
C．Be patient with the problem.
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单项选择题
A．He’s afraid to take exams.B．He only took the fourth exam.C．He didn’t get the highest score on one exam.
A．He’s afraid to take exams.
B．He only took the fourth exam.
C．He didn’t get the highest score on one exam.
单项选择题
A．Every twenty minutes.B．Every half an hour.C．Once a day.
A．Every twenty minutes.
B．Every half an hour.
C．Once a day.
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