用方框中所给单词的正确形式填空。每次限用一次。

easy  strong  make  watch  worry

It’s sometimes ______ to give than to receive. Do you agree with me ?
______ more money, he worked late at night.
---How do you feel about endangered animals ?
---They make me ______.
I ______believe that he will succeed because he’s worked so hard and made so much progress.
---Do you like sports ?
---Yes, I’m looking forward to _______London 2012 Olympic Games.