问题
选择题
You can see as far as the Taibai Mountains on top of the building _____ the sky is clear.[ ]
A. when
B. where
C. though
D. because
答案
答案：A
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You can see as far as the Taibai Mountains on top of the building _____ the sky is clear.[ ]
A. when
B. where
C. though
D. because
答案：A