问题
选择题
People take naps at noon in hotter climates, ______ the heat makes work difficult in the early afternoon.
[ ]
A. which
B. what
C. when
D. where
答案
答案：D
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People take naps at noon in hotter climates, ______ the heat makes work difficult in the early afternoon.
[ ]
A. which
B. what
C. when
D. where
答案：D
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