单项选择题

A．Yesterday.
B．Last month.
C．Four years ago.
D．Five years ago.
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单项选择题
A．Yes, all right.B．The classroom is there.C．How time flies.D．Yes, let’s hurry.
A．Yes, all right.
B．The classroom is there.
C．How time flies.
D．Yes, let’s hurry.
单项选择题
The advantage of using computers is that they can______.
A．be more efficient at the busiest hours
B．help people cash money conveniently
C．return goods to suppliers
D．replace efficient employees for the personnel management
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