用所给单词的适当形式填空.

1. We are ______ (surprise) at what he does.

2. Tom, someone _______ (wait) for you in your office.

3. — Where _______ David ______ (swim)?

   — I can't find him.

4. We have fun _______ (talk) .

5. The zoo is a good place _______ (have) fun.