--- Look, Mr Green is on the other side of the street. --- It _____ be him.He has gone to London on business.
—How many students are there in your school? —_______ students, I think. A. Thousand of B. Three thousands C. Three thousand
—_______ do you have a sports meeting at your school? —Once a year. A. How soon B. How often C. How long
—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