Question

9. She didn't come to the party last Sunday.          ，she must have made the party more exciting (come)

她昨天没参加聚会。如果她来了的话，肯定会让这个聚会更有意思。

Answer 1

9. Had she come/If she had come虚拟语气的条件状语从句由if引导时,在口语中或非正式场合可以把if省略掉而改用部分倒装结构。