15. We spent the morning_________ around the old part of the city.

二: 基本短语搭配

14. I've accepted the job over the phone, but I haven't________ in writing yet.

13. The students________ the task in less than ten minutes.

12. We hope to become more _______in predicting earthquakes.

11. It's a book about the________ of the universe.

10. ________of this new treatment cannot take place until all the data has been collected.

9. Many people question the______ of God.

8. The house looked strangely________, though she knew she'd never been there before.

7. Police officers have to be_________ drivers.

6. There is no scientific ________to suggest that underwater births are dangerous.