21.The doctors _______ the medicines to the people in the flood area.
22.Much of the news provided by this newspaper is _______, not foreign.
23.He tried to _______relations with his former wife but he failed.
24.He _______ to study harder in the future so that he could have more opportunities to find a better job.
25.The _______ work continued for more than a week but there was still no sign of the missing boy.
26.Many kinds of animals are believed to have _________ from the earth
27.The engineers in this lab spent several weeks _______ their plans for the new bicycle.
28.Pine trees are usually believed to _______ cold weather.
29.Free medical service is _______ to nearly all the college students in China.
30.After working for twenty hours without any rest, the doctors were _______.
21.A 22.A 23.B 24.A 25.B
26.B 27.C 28.D 29.B 30.A