Recently the newspapers have reported several __________ of the coal mines happening in different provinces in China and the government has taken effective measures to stop such things.

________________of the students who took part in the military training（军训） is 450．

Their products enjoy 30 percent ________ of the market in this country because both the quality and their service are fine. 

You must read the _______ with great care to see if the drug contains PPA before it is taken.

The new law to punish the drunk driver has come into           since it passed.