单项选择题

Our teacher recommended that we ______ as attentive as possible when we visit the museum.

A. are
B. shall be
C. be
D. were
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If we believe something is good and true we should ______ to it.
A. hold up
B. keep on
C. hold on
D. keep up
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
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