单项选择题

A．They complete all their assignments.
B．They study hard for his tests.
C．They compete for the best seats in the class.
D．They read all his books.
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unbearable
单项选择题
A．Forty hours.B．Less than forty hours.C．About seventy hours.D．Less than twenty-five hours.
A．Forty hours.
B．Less than forty hours.
C．About seventy hours.
D．Less than twenty-five hours.
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