大池小池

言い換え問題です
①They are discussing the problem at the meeting .
→The problem is being discussed at the meeting

The problem is being discussed by them at the meeting. と答えたのは不自然ですか？

②状況から、文を作る問題です。
Read the situation and write the sentence with the words given.

I have been studying very hard for several weeks.
->I am satisfied with the results of the test.

訳が「一生懸命勉強しました」とあるのですが、have been studying は今のことではないのですか？
また、I was satisfied with~ と答えるのは不自然ですか？