I. 单项选择。从每小题所给的四个选项中，选出最佳答案。(每小题1分，共30分)
1. The Sydney Opera House is like a huge sailing boat with water ____ three sides.
A. at B. of C. in D. on
2. Our neighbours are so kind that they often give us a ____ when we are in trouble.
A. head B. heart C. hand D. foot
3. — We have known something about the accident, but we need more ____. Can you help us?
— Yes, sir.
A. details B. descriptions C. instructions D. spirits
