单项选择题

You are too rigid: you must learn to change your plans when the situation ______ it.

A. calls on
B. calls for
C. calls forth
D. calls in
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单项选择题
The clumsy movement of the giant panda amused all the ______.
A. visitors
B. witnesses
C. watchers
D. spectators
单项选择题
You can ______ your story by leaving out some unimportant details.
A. abridge
B. rewrite
C. reveal
D. change
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