The woman who is talking with Mr. Brown______ be Miss Li. She has gone to England.
| A．can’t | B．must | C．may | D．mustn’t |
.You ____ be tired—you’ve already been working for three hours without having a rest.
| A．must | B．mustn’t | C．can’t | D．may not |
— Do you come to South Korea for the ________ of seeing your family or doing business?— I come here on business.
| A．interest | B．benefit | C．purpose | D．thought |
With the help of his friends, he changed a lot. Maybe that’s the ____ of friendship.
| A．station | B．energy | C．decision | D．invention |
—What can we do to________ bird flu from spreading?
—Try not to buy or eat chickens that have not been checked.
A. preventB. cause C. discover
