昨天暴雨的时候你在干什么？
昨天下午4点左右你在干什么？我在给我朋友写信。
What were you doing at about 4 o 'clock yesterday afternoon? I was writing some letters to friends of mine.
昨天下午4点左右你在干什么？我在给我朋友写信。
What were you doing at about 4 o 'clock yesterday afternoon? I was writing some letters to friends of mine.
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