用所给词的适当形式填空。

1. We are very _________ (surprise) at the news.

2. Several _________ (foreign) visited our school yesterday.

3. Doctors often tell us _________ (drink) more water every day.

4. The boss left his office _________ (angry) without saying a word.

5. We will have the meeting on the _________ (twelve) floor.