【正确答案】 D

【答案解析】witness意为“目击，见证”，符合本题题意，如：We witnessed a strange change in her．我们亲眼看到了她奇怪的变化。restrain则意为“克制，抑制”，如：If you can't restrain your dog from biting other people，you must lock it up．如果你无法管住你的狗不咬别人，就必须把它关起来。withhold作“把……扣留着，压住”讲，如：He tried to withhold the truth from us．他试图不让我们知道真相。restore意为“恢复，归还，修复”，如：The stolen article has been restored to its owner．失窃物品已归还原主。