During the construction of the Qinghai-Tibet Railway, 33 migration overpasses have been made for herds of Tibetan antelopes to go through their breeding grounds.
A. admirable
B. available
C. abundant
D. appropriate
网友回答
(答案→)A. admirable
B. available
C. abundant
D. appropriate
解析：考查单词辨析。admirable令人钦佩的；极好的；值得赞扬的；available可得到的，可利用的；abundant大量的；appropriate适合的，适当的
句意：在青藏铁路的建设中，33座立交桥被建造的非常好，为了藏羚羊赶到他们的繁殖地。