I know Mr Brown； we ＿＿＿＿＿＿ to each other at an international conference.
| A．are introduced | B．have been introduced |
| C．were introduced | D．had been introduced |
—________ that makes her different from the other students?
—Honesty, hard work and, I suppose, a bit of imagination.
| A．What do you know | B．What do you think it is |
| C．How do you believe | D．How come that |
She often argues ______ her classmates ______ small things，which sometimes makes them very unhappy.
| A．with；for | B．with；about |
| C．to；for | D．to；about |
Before going abroad，he devoted all the time he could ________ his spoken English.
| A．to improve | B．to improving |
| C．improve | D．Improving |
Nobody but doctors or nurses and those ____ by Dr Hu ____ to enter the patient’s room.
| A．invited; is allowed | B．are invited; are allowed |
| C．being invited; allowed | D．invited; are allowed. |
Zhu Zhiwen，________ grassroot singer，was ________ real hit in 2012.
| A．the；/ | B．a；the | C．a；a | D．the；a |