问题
选择题
—What about going to the South Lake for a picnic next weekend?
— OK. But I'm not sure _______ it will rain.[ ]
A. why
B. where
C. when
D. whether
答案
答案：D
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—What about going to the South Lake for a picnic next weekend?
— OK. But I'm not sure _______ it will rain.[ ]
A. why
B. where
C. when
D. whether
答案：D