The radiation amount of a mobile phone for two half-hour periods per day is equal to ________ to an X-ray for ten seconds.
Our country should set up more national parks animals can live freely.
— Can the project be finished as planned? — Sure. it completed in time, we’ll work two more hours a day.
Don’t litter in the street in Singapore, you could be arrested.
In the past several weeks, many cities in Northern China from heavy fogs and severe cold.
she was out of the room, he took a quick look at the papers on her desk.