Нужно раскрыть скобки.
1. I want to see how much the place (change) since I was there last
2.Jane usually works in the library. She (work) there now. She already (gather ) the necessary material and now she (write) her report. She (work) for 5 hours already.

1. I want to see how much the place has changed (Present Perfect) since I was there last
2. She is working (Present Progressive/Continuous) there now. She has already gathered (Present Perfect) the necessary material and now she is writing (Present Progressive/Continuous) her report. She has been working (Present Perfect Progressive/Continuous) for 5 hours already.

1) I want to see how much the place has changed since I was there last.
2) Jane usually works in the library. She is working there now. She has already gathered the necessary material and now she is writing her report. She has been working for 5 hours already.

Удачи в учёбе!