问题描述：
13. She usually takes a nap _____ noon.
13. She usually takes a nap _____ noon.
A. on
B. at
C. in
D. of
满分：4 分
13. She usually takes a nap _____ noon.
A. on
B. at
C. in
D. of
满分：4 分
问题解答：
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