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[单选题]
It’s sunny today. _______, I’m sure the plane will arrive on time.(1分)
A
While
B
Therefore
C
However
D
Otherwise
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试题答案：
B
答案解释：
解题思路：13.本题考查连词用法。根据句意“今天天气晴好，因此我肯定飞机会准时降落”， 故答案选择B项，therefore,表示因果关系。
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