单项选择题

Our department has a large collection of books,（）are in English.

A．many of which
B．many of them
C．many ones
D．their many

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单项选择题
— Excuse me, could you please have my computer（） — Of course.

A．repair
B．repairing
C．repaired
D．be repaired
单项选择题
He saved the drowning child（）the cost of his own life.

A．on
B．at
C．for
D．with
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