China recently tightened its waters controls near the Huangyan Island to prevent Chinese fishing boats from in the South China Sea.
Two people were killed in the serious car _______ the other day.
It is said that the temperature is unusual mainly _______ global warming caused by human activities.
The transformation of our city will make _______ for people here to have a comfortable environment.
Mary _______ her mother with the housework, but she didn’t.
The local government announced that only when the fire was under control ________ to return to their homes.