—Your pen is very nice.—________________.
—Don’t eat too much candy, for it’s_____ your teeth.—Oh,I get it.Thank you.
_____ my teacher, I passed the English exam.
Miss Gao has taught us English two years. I have been here two years ago.
The U.S.A. is a country while China is a country.A. developing; developed B. developed; developingC. developing; developing D. developed; developed
—It smells terrible. What has happened here?—Look, there is much waste gas _____ from the chemical factory.