从每组单词中找出划线部分读音与其他三个不相同的选项。（每小题1分，共5分）
What were you doing ___it was raining outside?
---Oh, it’s raining outside. Don’t leave ____ it stopes.
Please _________ early tomorrow, mum.
The students stopped __________ when the teacher came in.
She often ______ Beijing at the weekend last year.
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