It is fairly common in Africa for there ___________ a group of expert musicians surrounded by others who also join in the performances.
| A．being | B．to be | C．be | D．is |
______ around the clock for two days，David managed to finish the report for the manager on schedule.
| A．Working | B．Worked |
| C．Having worked | D．To work |
So touching ______ that I couldn’t hold my tears back when I heard it for the first time.
| A．the song had sounded | B．had the song sounded |
| C．the song sounded | D．did the song sound |
China marked its first Constitution Day on December 4, 2014 ______ making the Constitution part of Chinese people’s daily life.
| A．in the hope of | B．in the form of |
| C．in honor of | D．in terms of |
Making a speech in front of a crowd of people is not his strength but he ______ it with his heart and efforts．
| A．takes advantage of | B．makes up for |
| C．1ives up to | D．gets hold of |
There are more than 740 million Chinese ______ to second-hand smoking in public places now.
| A．are being exposed | B．to expose |
| C．having been exposed | D．exposed |