About one fifth of the world population Chinese. China is a country with population in the world.
A．is; a largest B．are; the largest C．is; the largest
—Which is _______, the sun, the moon or the earth?
—Of course the sun.
A. smaller B. the smallest C. the biggest
____ bad the weather is!
A. What B. How a C. How
—Must I go to see a doctor when I have a cold?
—No, you _______.
A. don’t B. needn’t C. can’t
—Would you mind _______ in the classroom?
—Sorry, I won’t do that again.
A. not running B. don’t run C. not to run
You must stop _______. My father is sleeping.
A. talk B. talking C. to talk