题目内容
18．你只有在不远离河岸的条件下才能去游泳．（on condition that）You can go swimming on condition that you don't go too far from the river bank．．分析 此题考查on condition that引导的条件状语从句，表示"如果…，在…条件下，若…则…"，相当于if；接着是短语的翻译"游泳"go swimming，"远离"far from，根据短语和从句的连接就能翻译出此句．
解答 4．You can go swimming on condition that you don't go too far from the river bank．
点评 此题注意on condition that引导的条件状语从句，表示"如果…，在…条件下，若…则…"，相当于if，再根据意思进行翻译即可．
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8．--It was 3o'clock_______we arrived at the village．
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--Oh，it was also at 3o'clock______we arrived at the village．（ ）
| A． | when；when | B． | that；when | C． | that；that | D． | when；that |
6．
Dogs Used to Be More Like Cats
Researchers studying fossils （化石） of the early ancestors of dogs that lived up to 40million years ago believe the predators （捕食性动物） evolved as a direct consequence of climate change．The study claims the （41）C transformed man's best friend from a creature that behaved more like a cat，into the canine （犬） we know and love today．
Ancestors of dogs living in North America 40million years ago were ambush （伏击式） predators-in a（n） （42）I way to cats'．But a million years later，the thick forest that once covered the continent began to give way to grasslands．This led to a（n） （43）G in the body shape and hunting behavior of dogs，turning them into animals that no longer （44）K their prey （猎物），but chased it down instead．
This evolutionary transition was （45）F by the scientists who examined the elbows and teeth of 32species of dogs that lived between 40million and two million years ago．
"The elbow is a really good （46）A of what carnivores （食肉动物） are doing with their forelimbs （前肢），which tells their entire （47）D abilities，"said Brown University's Christine Janis，who led the study．
The research was based on an analysis of fossil specimens （标本） in the American Museum of Natural History in New York．It suggests dog evolution was directly related to climate change．After all，it was not （48）J to operate as a pursuit-and-pounce predator until there was room to run．
If predators evolved with climate change over the last 40million years，the authors argue they may continue to （49）E in response to the present global warming trend．In this way，the results of the study could help （50）B how animals may look in the future．
| A．indicator | B．predict | C．process | D．movement | E．adapt | F．tracked |
| G．formation | H．deliberate | I．similar | J．advantageous | K．surprised |
Researchers studying fossils （化石） of the early ancestors of dogs that lived up to 40million years ago believe the predators （捕食性动物） evolved as a direct consequence of climate change．The study claims the （41）C transformed man's best friend from a creature that behaved more like a cat，into the canine （犬） we know and love today．
Ancestors of dogs living in North America 40million years ago were ambush （伏击式） predators-in a（n） （42）I way to cats'．But a million years later，the thick forest that once covered the continent began to give way to grasslands．This led to a（n） （43）G in the body shape and hunting behavior of dogs，turning them into animals that no longer （44）K their prey （猎物），but chased it down instead．
This evolutionary transition was （45）F by the scientists who examined the elbows and teeth of 32species of dogs that lived between 40million and two million years ago．
"The elbow is a really good （46）A of what carnivores （食肉动物） are doing with their forelimbs （前肢），which tells their entire （47）D abilities，"said Brown University's Christine Janis，who led the study．
The research was based on an analysis of fossil specimens （标本） in the American Museum of Natural History in New York．It suggests dog evolution was directly related to climate change．After all，it was not （48）J to operate as a pursuit-and-pounce predator until there was room to run．
If predators evolved with climate change over the last 40million years，the authors argue they may continue to （49）E in response to the present global warming trend．In this way，the results of the study could help （50）B how animals may look in the future．