问题
选择题
These animals sleep _______ the day but get up ________ night. [ ]
A. at, during
B. during, during
C. at, at
D. during, at
答案
答案：D
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These animals sleep _______ the day but get up ________ night. [ ]
A. at, during
B. during, during
C. at, at
D. during, at
答案：D