— British engineer,Tim Berners-Lee the idea of the World Wide Web in 1989.— You’re right,and the World Wide Web is 26 years old this year.
Many more trees should ____ this year.
—____ the workers are very tired, ____they keep on working. — They are great. We must learn from them.
If Tony_____ to the corner this weekend, Bob will join him.
Her husband is a great cook. So she can enjoy _____ food every day.
—Would you mind opening the window? —____. Look at the heavy haze (霾) outside.