【题目】My mother is washing clothes. The doorbell rings. （用but连成一句话）
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【答案】My mother is washing clothes, but the doorbell rings.
【解析】
原句句意：我的妈妈正在洗衣服。铃声响了。用but连接后句意为我的妈妈正在洗衣服，但是铃声响了。故答案为My mother is washing clothes, but the doorbell rings.
