— 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.
--- Sixteen-year-olds should not be allowed to drive. --- _________ . It’s dangerous.
--- Could you please turn on the radio ? I am used to sleeping with the radio ________. --- Sure.
--- ________ it was very hot, he still played basketball on the playground. --- He is crazy about basketball.
--- _____ you _____ to ride a motorbike ? --- Yes. But last month I sold it and bought a car.
Science is really _______ useful sucject although it is very difficult.