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24题的答案是（ ）
A、both
B、in
C、Between
D、before
【正确答案】：C
【题目解析】：第24题考查的是介词的使用。题目中的句子是“One million acres alone vanished 24 1985 and 1995.”，意思是“仅在1985年和1995年之间，就有一百万英亩的土地消失了。” 在这个句子中，需要用一个介词来表达“在……之间”的意思。选项A "both" 通常用于连接两个名词或代词，表示“两者都”，不符合句意。选项B "in" 用于表示时间或空间的包含关系，比如“在某一年里”或“在某个地方”，也不符合句意。选项C "Between" 用于表示两个时间点或地点之间的范围，符合句子的需求。选项D "before" 表示在某个时间之前，同样不适用于这个句子。 因此，正确答案是C "Between"，表示“在1985年和1995年之间”。