单项选择题




What is NOT mentioned about the solar backup system

A．It is easy to install.
B．It requires little maintenance.
C．It is cost-effective.
D．It is reliable.
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单项选择题
What was the problem with the air conditioning Mr. Henry purchased
A．The air conditioning filter wasn"t replaced.
B．The thermostat was turned down too low.
C．The freon pressure was lower than normal.
D．The fan motor was out of order.
单项选择题
What did John Bradley mention to the committee members
A．The Web site has not met the targeted visitors.
B．The sales goal was reached last month.
C．The conference in New York was cancelled.
D．The additional advertisement was placed.
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