单项选择题

He tried to cope with the ever-increasing burden of his work, but finally he ________and had to take a complete rest.

A．broke through
B．broke out
C．broke into
D．broke down
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单项选择题
His ________change very quickly; one moment he's cheerful, and the next he's complaining about everything.
A．minds
B．moods
C．motives
D．motions
单项选择题
If a government chooses to allocate more of its resources to its military forces, there is a possibility of reduction in resources allocated for________.
A．libraries and education
B．libraries and business firms
C．education and business firms
D．libraries, business firms and education
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