Would you like to play basketballwith us this afternoon? — I have to study fortomorrow’s test.

People often have this belief _______economic development is bad for the environment, but this does not have to be true.

The computer was used in teaching. As a result, not only _____, but students became more interested in the lessons.

Facebook is one of the most popular websites in Britain ___ over twenty-five million users.

If better use is ____ of your spare time, you’ll make great progress in it. [ ]