--Can I help you?--I'd like to buy a present for my father's birthday, ___________ at a proper price but of great use.
It is the _______in the country to go out and pick flowers on the first day of spring.
---Poor Steve! I could hardly recognize him just now! ---__________. He has changed so much!
If it is __________ for you to go out tonight, would you like to go to the cinema with me?
He made a great __________ to the success of the project.
A student in our school will be immediately sent home if he is found __________ computer games at night.