用所给单词的适当形式填空。

1. He is          (write) an email to his father now.

2. That big ship           (sink) into the sea many years ago.

3. He was very excited when he           (read) the letter from his mother.

4.I think playing basketball is           (excited).

5. Did you see Mei Ling           (play) computer games when you came in?