当演讲者结巴时，观众开始嘲笑他。
The crowd started to ___jeer when the speaker stuttered.
当他摔倒时，一些学生在旁边嘲笑他。
Some students ___jeered at him when he fell down.
当运动员摔倒时，一些观众开始起哄嘲笑。
Some spectators started ___jeering when the athlete fell down.
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