____ computers are of great benefit to the development of science and technology.

Why not paint the Golden Gate Bridge blue or other colors—The bridge has always been painted “International Orange” ______ that color is easier to see in the heavy fog.

How does Jack usually go to school—He _____________ride a bike, but now he _____________there to lose weight.

Have you ever wondered why some of the smartest students in your class sometimes ________ failing exams?

Would you mind closingthe window to keep out the noise—________．I’lldo it right away．