____________(她非常不情愿地)that she agreed to help.

　　答案：It was very reluctantly

　　解析：本题较难。考查的并不是形式主语句，二是一个强调句型。本句可以说成：She agreed to help very reluctantly. 原句的需填补部分是对状语的强调，以突出“极不情愿”这一信息中心。强调句用途很广，我们可以根据上下文和语义意图分别强调句子的主语、间接宾语、直接宾语、状语等。