大学英语：词汇习题：Pine trees are usually believed

　　21.The doctors _______ the medicines to the people in the flood area.

　　A. distributed

　　B.packed

　　C.prayed

　　D.undertook

　　22.Much of the news provided by this newspaper is _______, not foreign.

　　A. domestic

　　B.strain

　　C.purchase

　　D.murder

　　23.He tried to _______relations with his former wife but he failed.

　　A. measure

　　B.maintain

　　C.shelter

　　D.reply

　　24.He _______ to study harder in the future so that he could have more opportunities to find a better job.

　　A. resolved

　　B.resorted

　　C.requested

　　D.reserved

　　25.The _______ work continued for more than a week but there was still no sign of the missing boy.

　　A. research

　　B.rescue

　　C.vessel

　　D.vast

　　26.Many kinds of animals are believed to have _________ from the earth

　　A. withdrawn

　　B.vanished

　　C.found

　　D.hung

　　27.The engineers in this lab spent several weeks _______ their plans for the new bicycle.

　　A. counting

　　B.stripping

　　C.elaborating

　　D.casting

　　28.Pine trees are usually believed to _______ cold weather.

　　A. guard

　　B.accomplish

　　C.roar

　　D.endure

　　29.Free medical service is _______ to nearly all the college students in China.

　　A. favorite

　　B.available

　　C.convenient

　　D.average

　　30.After working for twenty hours without any rest, the doctors were _______.

　　A. exhausted

　　B.mounted

　　C.wrapped

　　D.restored

　　答案：

　　21.A 22.A 23.B 24.A 25.B

　　26.B 27.C 28.D 29.B 30.A