单项选择题

A．Install more machines.
B．Test the machines.
C．Buy more machines.
D．Sell the machines.
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单项选择题
A．To make an apology.B．To place an order.C．To ask about delivery.D．To cancel an appointment.
A．To make an apology.
B．To place an order.
C．To ask about delivery.
D．To cancel an appointment.
单项选择题
A．Three weeks ago.B．Last month.C．Last week.D．Last Monday.
A．Three weeks ago.
B．Last month.
C．Last week.
D．Last Monday.
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