Here are the verbs in their appropriate forms:

1. A: I **have been waiting** for more than two months for my insurance claim regarding my hospital treatment.
B: I can assure you Madam that our assessors **are working** on your claim at this very moment. You should have your money soon.

2. So many natural disasters **have occurred** so far this year. There **have been** earthquakes, forest fires, eruptions of volcanoes, and floods already.

3. As the service offered at the official departments **has been deteriorating** steadily for the last few years, the government **is planning** a large-scale modernization for this year.

4. Anton **has been threatening** Freddie with violence lately, and although he **has not hurt** Freddie physically, the teachers **think** that they **need** discussions with Anton's parents about his behavior.