单项选择题

The ratio of the work done by the machine（）the work done on it is called the efficiency of the machine.

A. against
B. with
C. to
D. for

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单项选择题
Up went the prices and（）

A. the living standard came down
B. down did the living standard come
C. came down the living standard
D. down came the living standard
单项选择题
The projects（）by the end of 2002 will expand the city’s telephone network to cover 1,000,000 users.

A. being accomplished
B. to be accomplished
C. accomplished
D. having been accomplished
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