Question

6. You just can't imagine        over the past three months. (progress)

你简直无法想象在过去的三个月中她取得了多大的进步。

Answer 1

6. what great progress she has made宾语从句里又含一个感叹句。从句中有时间状语"in/for/ over the past+时间名词"时，其谓语动词用现在完成时。