Friendly contacts between different peoples of the two countries

Friendly contacts between different peoples of the two countries ______ （facilitate） the cultural and economic interchange in recent years.
【正确答案】：have facilitated
【题目解析】：主语为contacts是复数，谓语动词也用复数形式，时间状语为in recent years表示从过去持续到现在现在的状态用完成体。