Question

15．Measuring up to 10.5 feet in length，the western green mamba （曼巴蛇） is the second longest snake in Africa，with the black mamba being the first．It is also the most agile （敏捷的） snake in the mamba family．Their color is changeable，which helps them join their environment．Another distinctive feature of the snake is its long tail with a sharp point．
The western green mamba lives in rain forests．Being an arboreal species，these snakes spend most of their time moving among the tree tops．However，they usually leave their trees to pursue a potential meal on the ground．The western green mamba is mostly active at day，but can also be seen hunting at night．
The diet of a western green mamba consists of birds and a variety of small mammals such as squirrels，mice and even bats．These snakes will approach their targets with the help of their natural skin color．When they are close enough，they will bite their victims and inject them with venom（毒液） quickly．Once the target has died，the weatern green mamba will swallow its meal whole．If faced with danger，these snakes will try to run away．If they are cornered，however，they will become extremely aggressive and strike with their sharp teeth repeatedly．The female weatern green mamba is the one who lays eggs．She will lay eggs anywhere．The young snakes are completely independent．The mother and father play no part in raising the baby snakes．The babies are born with everything they need to survive in the wilderness．They will have almost no natural predators（捕食者）to worry about when they reach adulthood．
29．In order to avoid being found，the western green mambaD．
A．spends most of the day sleeping
B．rarely comes out to hunt for food
C．tends to stay on trees most of the day
D．hides itself well with the help of its skin color
30．What does the underlined word"arboreal"in the second paragraph probably mean？C
A．Mainly feedig on meat．
B．Mainly feeding on plants
C．Living on trees most of the time           
D．Living in the grass most of the time
31．When is the western green mamba most aggressive？D
A．when it has to protect its eggs
B．When it is searching for food．
C．When it approaches its target
D．When it gets no way to escape
32．What can we learn from the text？D
A．The western green mamba can be found all over Africa．
B．The western green mamba is the longest snake in Africa．
C．The western green mamba often swallows live animal whole．
D．The baby western green mamba doesn't need care．

Answer 1

分析 本文講述了生活在非洲大陸上的第二長蛇，曼巴蛇．介紹了其特征，棲息地，食物及習性．

解答 DCDD
29．D  細節(jié)理解題 根據(jù)第一段Their color is changeable，which helps them join their environment．可知，曼巴蛇的皮膚是可變的，這是它的保護色，用來偽裝捕獵，故答案為D
30．C 細節(jié)理解題 根據(jù)下句Being an arboreal species，these snakes spend most of their time moving among the tree tops．可知，arboreal意思是在樹上生活的，谷答案為C
31．D 細節(jié)理解題 根據(jù)最后一段If they are cornered，however，they will become extremely aggressive and strike with their sharp teeth repeatedly．可知，當蛇無路可走的時候，會非常具有攻擊性，故答案為D
32．D 細節(jié)理解題 根據(jù)最后一段The mother and father play no part in raising the baby snakes．The babies are born with everything they need to survive in the wilderness．可知，曼巴蛇的幼蛇是得不到成年蛇的照顧，全靠自己生存，所以答案為D

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