-You look so worried, what’s wrong? -More and more people like me begin to worry about the ______ pollution after the haze (雾霾) appeared in Beijing and some other cities in China.
—butter do we need for a sandwich? —Two teaspoons should be enough.
This kind of computers the popular.
There areteachers in that school.
Some scientists believe that theremore robots in the future.
One day I_________ to Australia.