(2012·福建高考)China recently tightened its waters controls near the Huangyan Island to prevent Chinese fishing boats from ________ in the South China Sea.

 Traffic jams          loss of time – and loss of health, according to a recent research.

Emergency line operators must always ________ calm and make sure that they get all the information they need to send help.

There are a number of methods to provide           relief from your toothache, which can’t cure the problem. 

The Foreign Ministry Spokeswoman on Thursday urged Japan to stop making irresponsible ________ on the incident in waters off the Diaoyu Islands.