People are often made ________ by the ________ man.
| A．laugh; interested | B．to laugh; interested |
| C．laugh; interesting | D．to laugh; interesting |
— _____ do you go swimming with your father, Jane?
—About once a week.
A. How long B. How many times C. How often
Peter will take part in the boys’_____ tomorrow.
A.800-meter race
B. 800-meter races
C. 800- meter- races
— What should we do to prevent the flu?
—We should keep our rooms_____ and the air fresh all the time.
A. cleaning B. cleaned C. clean
— When did your school hold the sports meet?
—Last week. And I _______ the high jump.
A. joined B. took part in C. will join
— Must we go to see a doctor at once when we have the flu?
—No,_____.
A. we mustn’t
B. we shouldn’t
C. we don’t have to