----What made her so upset? ----________.
With time going by, we have come to realize that creativity is it takes to keep a nation highly competitive.
As we all know, , the pollution will get worse and worse.
—It is a long time I saw you last time.—Yes. And it will be a long time we see each other again.
many times, but he still couldn’t remember the Chinese meaning of this word.
Whenever I enter the library, I see him at the back of the library reading.