______ private cars are bringing us convenience, they also cause more traffic accidents and pollution.
| A．While | B．As | C．If | D．Since |
He kept a little notebook, in which ______ the names and addresses of his friends．
| A．wrote | B．was writing | C．was written | D．were written |
--- How do you deal with the disagreement between the company and the customers?
--- The key __ the problem is to meet the demand__ by the customers．
| A．to solving; making | B．to solve; making |
| C．to solving; made | D．to solve; made |
“Don’t you believe me?” “______, I’ll believe _______ you say．”
| A．No; whatever | B．Yes; no matter what |
| C．No; no matter what | D．Yes; whatever |
Mary is very clever and _____ worth teaching, but her brother is not．Look, he is now _____ asleep in class．
| A．very, very | B．much, very | C．well, very | D．well, fast |
U．S．President Barack Obama arrived in China’s economic center Shanghai on Sunday night, November 15th 2009, ___ a state visit to China．
| A．starting | B．started | C．to start | D．having stated |