Tom is a hard-working student．In fact, you cannot find anyone in the class ____．

Eric, a middle-aged fashion designer, is very happy because the clothes be designed have never been ________.

---I’m afraid I don’t have the ability to make a speech in public. I’m too nervous. ---Don’t worry. You will overcome it _______if you practice more.

The new education system is said to be _______ to the successful development of the country.

Mr. Stevenson is great to work for—I really couldn’ t ask for a _______ boss.