The destruction of habitats(栖息地)all over the world is the primar

The destruction of habitats(栖息地)all over the world is the primary reason species are?becoming extinct(灭绝)or endangered．Houses,highways,dams,industrial buildings,and?ever-spreading farms now dominate?21?formerly occupied by forests,deserts,and wetlands．22?the beginning of European settlement in America,23, over 65,000,000 acres of?wetlands have been drained．One million acres alone vanished 24?1985 and 1995． Habitat destruction can be?25?or it can be subtle,occurring over a 26?period of time?without being noticed．27?such as sewage from cities and chemical runoff fromfarms,can change?the?28?and quantity of water in streams and rivers．To?29?living in a delicately balanced?habitat,this disturbance can be as 30?as the clear-cutting of a rainforest． 31?remaining habitats are carved into smaller and smaller pockets or islands,remaining?species are forced to exist in these?32?areas,which causes further habitat?33?These?species become less adaptable to environmental?34；in fact,they become?35?endangered．Scientists believe that when a habitat is cut by 90%,one-half of its plants,animals and insects will?become extinct． 第32题的答案是（ ）
A、Crowded
B、extensive
C、large
D、bare
【正确答案】：A
【题目解析】：在第32题中，上下文提到“remaining habitats are carved into smaller and smaller pockets or islands”，意味着剩余的栖息地被分割成越来越小的区域或岛屿。在这样的背景下，物种被迫在这些小区域内生存，这导致了栖息地的进一步丧失。因此，这些区域必然是拥挤的（crowded），而不是广阔的（extensive）、大的（large）或裸露的（bare）。 A选项“Crowded”符合这种描述，表示物种被迫在有限的、拥挤的空间内生存。因此，正确答案是A。 B选项“extensive”意味着广阔的，这与文中描述的越来越小的区域不符。 C选项“large”表示大的，同样与文中描述的情境不符。 D选项“bare”表示裸露的，这通常用于描述没有植被或覆盖物的土地，而不是描述物种生存的空间。 综上所述，第32题的正确答案是A。