1£®Switzerland is a mountainous (mountain) country with a population of about 9 million people.

2£®When I was in high school, I finally overcame (overcome) my shyness in class.

3£®Gary was too drunk (drink) to remember what happened that night.

4£®The ability to give clear explanation (explain) is the most important quality for a teacher.

5£®We were late when we got to the airport, but fortunately (fortunate) our plane was delayed.

6£®Unexpectedly, her first novel enjoyed an astonishing (astonish) success.

7£®I didn't laugh because I didn't find the joke at all amusing (amuse)£®

8£®People may feel a sense of failure (fail) sometimes, which is common in their daily life.

9£®She's a wonderfully creative dancer but doesn't have the gift of becoming a great performer (perform)£®

10£®There has been no convincing (convince) evidence that smoking causes lung disease.