— I’ve just been to my first language class.— Oh really? ________ . Which language are you studying?
A special dance ________ horse dance becomes so hot that many famous people can't help copying that.
—Who is the girl over there?—Isn't that the secretary you want ________ the article?
As the immune system weakens, it loses the ability ________ illnesses.
My mother went to the private school in person ________ that I would be safe there.
China is expected to export 1 billion mobile phones this year, ________ by a surge in demand for smartphones worldwide.