单项选择题

If we believe something is good and true we should ______ to it.

A. hold up
B. keep on
C. hold on
D. keep up
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单项选择题
I am not used ______ to like that.
A. to being spoken
B. to speak
C. being spoken
D. to speaking
单项选择题
Advertising media like direct mail, radio, television and newspapers ______ to increase the sales of industrial products.-
A. have been used
B. will be used
C. is being used
D. has been used
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