What should I wear to attend his wedding party?——Dress ____ you like.

Jack, is maths difficult to learn in Highschool —-Sure. No subject can be learnedwell __________hard work.

It is ________that he will attend this party. [ ]

These new types of energy from the sun, wind and water cost very little and will never ________.

The old man has four sons, and two _____ turned doctors