问答题

Which of the following is an economical measure for energy conservation?
A．Investing in new forms of facilities.
B．Making more efficient refrigerators.
C．Requiring white roofs for buildings.
D．Toughening fuel economy standards.

A.Investing
B.
B．Making
C.
C．Requiring
D.
D．Toughening
E.

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Your friend needs to come earlier,___?

A.does he
B.doesn't he
C.need he
D.needn't he

The author implies that Washingtons smoking ban is______.
A．deplorable
B．appreciable
C．dishonorable
D．unacceptable

A.
A．deplorable
B．appreciable
C．dishonorable
D．unacceptable