根据汉语意思完成句子。
1.我们有一位这起杀人案的目击证人.
We have _ the killing.
2.警察呼吁凡目击这一事故的人与他们联系.
Police have appealed for anyone who the incident to contact them.
3.他身体健康证明这种疗法是成功的.
His good health is the success of the treatment.
4.演出的成功证明我们计划周全.
The success of the show our good planning.
1.a witness to
2. witnessed
3. a witness to
4. bore/gave witness to