_____ he works hard, I don’t mind when he finishes the experiment

Experts have been warning___of the health risks caused by passive smoking

Wang Haijian, Hubei bombing principal, was shotto death for his leading role in __________ a homemade bomb near a branch ofstate-owned China Construction Bank in Wuhan on Dec. 1, 2011.

How are you getting on with your work—I can’t do it anylonger. I’ll have to get help.

o I takethis medicine —Well, look at the _______.