Question

Rats usually live in holes.They run from these holes to the places where they eat and drink.They have special paths on which they travel each time.So they know their paths quite well.

If anything new，such as stone or wood，is put in the path，the rats won’t go near it at first as they are too frightened.It will take them many days to get over the fear.They are also frightened to go near a place that they know，where something has been taken away.If a path goes around a rock，the rats follow the same path around the rock each time.If the rock is taken away，they will still run round the place where the rock was！They won’t cross the empty place which is now open to them，even though it would be quicker.

Rats will always keep away from anything unusual to them.That’s why they won’t eat poison on the first or second night.They usually won’t go anywhere near it for about four days until they get used to being there.Even then they only eat a little at a time.

If people want to kill rats with poison，all they have to do is to leave it out for a few days.Once the rats have got used to it，they will eat it，and die.

56．This passage mainly tells us________.

A．how a rat destroys our food                   B．how to poison a rat

C．what a rat’s habit is                               D．poisoning a rat is not easy

57．How does the writer feel about rats?

A．They are clever and cunning.

B．They are the most dangerous enemy.

C．They are not smart but shy.

D．It’s easy for them to get close to an unknown object.

58．________，rats have special paths to travel each time.

A．Because they live in holes most of the time

B．To find more food to eat and enough water to drink

C．In order not to eat anything poisonous

D．To protect themselves

59．If you want to kill a rat，________.

A．you should make it get used to the poison

B．you should drive it out of the hole

C．you should place a rock on the path along which it runs

D．you should make it get over the fear to cross

Answer 1

56．B　文章開頭提出人們藥老鼠時發(fā)現(xiàn)的問題(它們不吃有毒的食品)，結(jié)尾指出藥老鼠應該怎么做，這就說出了中心思想：怎樣藥老鼠。中間段落描述老鼠的習性只是為了說明老鼠為什么在一兩天內(nèi)不碰毒藥，不是中心內(nèi)容，故不選C項。

57．C　人們通常認為老鼠狡猾又聰明，但實際觀察表明，它只是膽怯，故選擇C項。D項與原文相反。

58．D　文中提到老鼠只走他們熟悉的路線。如果出現(xiàn)新的情況，老鼠會感到frightened，所以選擇“為了保護自己”。

59．A　從文中論述老鼠的習性及最后一段的總結(jié)，可知只要老鼠習慣了毒藥的存在，它就會吃。