1. 你答应和我一起去购物，所以你必须遵守诺言。(keep one's word)
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2. 我因为没能接你而必须向你道歉。(apologize)
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3. 这首歌使我想起了我的童年。(remind)
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4. 很明显老师对我们不满意。(obvious)
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5. 他决定埋头工作以忘掉悲伤。(drown)
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