Question

【题目】Over the past 12 years, American and Chinese leaders have met (frequent) to discuss a whole host of issues.

Answer 1

【答案】frequently
【解析】句意：在过去的12年里，美国和中国领导人已经进行频繁的会晤，讨论一系列问题。副词修饰动词，所以答案是frequently。