题目内容
4. 他发现他错把Sally的太阳镜装进他的书包里了。
He found that he had put Sally's sunglasses into his backpack
4. by mistake
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题目内容
4. 他发现他错把Sally的太阳镜装进他的书包里了。
He found that he had put Sally's sunglasses into his backpack
4. by mistake