After Mr. Brown _______ smoking, he didn’t cough any longer.
| A．cut up | B．turned up |
| C．took up | D．gave up |
A cellphone _____ a camera by most young people in China.
| A．is used by | B．used for |
| C．is used as | D．is used to |
Although we have learned English for 3 years, we still have trouble _____ the new words.
| A．learn | B．to learn |
| C．learning | D．of learning |
—I want to be a doctor.
—Doctors _____ greatly in every part of the world, I think.
| A．need | B．are needed |
| C．are needing | D．will need |
Mike will go abroad tomorrow. I am going to _____ at the airport.
| A．sent him off | B．saw him off |
| C．see off | D．see him off |