15.We've talked about snails(蜗牛)and their slow move.But much of the time snails don't move at all.They're in their shells sleeping.
Hot sun will dry out a snail's body.So at the least sign of hot sun,a snail draws its body into its shell and closes the opening with a thin cover.Then it goes to sleep.A snail will die in a heavy rain.So whenever it rains,it goes inside its shell house and goes to sleep.A snail can sleep for as long as it needs to.It can take a short sleep.Or it call sleep for days at a time.And it spends all the winter months in its shell,asleep.
In spring the snail wakes up.Its body,about three inches long,comes out of from the shell.
When hungry,the snail looks for food.It can't see very well.Its eyes,at the ends of the top feelers are very weak.But its sense of smell is very strong.It helps the snail to the new greens.Then the snail's little mouth goes to work.
A snail's mouth is no longer than the point of a pin(针).Yet it has 256,000teeth!The teeth are so small that you can't see them.But they do their work.If you put a snail in a hard paper box,it will eat its way out.And if a snail wears out its teeth,it will grow new ones.
Mostly,a snail looks for food at night.But on cloudy days it eats in the daytime.It eats all day long.A snail can go on eating for hours and never feel full.
46.A snailC.
A.moves more slowly in the daytime
B.has thousands of feet
C.sleeps much of the time
D.doesn't move at all
47.The underlined word"draw"in the second paragraph meansD.
A.to make with a pen
B.to keep away from
C.to move to end
D.to push
48.From the story we knowB.
A.the snail's shell is very thin
B.a snail can't see well
C.the snail's nose is quite short
D.the snail's body changes with seasons
49.A snail goes to sleep whenD.
A.it feels hungry
B.it is put in a paper box
C.spring is coming
D.it rains heavily
50.Which of the following in NOT TRUE according to the passage?A
A.The snail,s teeth can,t be worn out.
B.In winter the snail doesn't eat or move.
C.A snail doesn't like living under the sun.
D.The snail's strong sense of smell helps to find things far away.
分析 这篇短文是关于蜗牛的.蜗牛大部分的时间都在睡觉,不管是晴天还是雨天,它都缩在壳里睡觉,冬天还会冬眠.春天它就醒了,用它的嗅觉来寻找食物.蜗牛有很多牙齿,可以用来吃东西,而且牙齿会更换.它一般晚上寻找食物.
解答 46.C 细节理解题.根据第一段But much of the time snails don't move at all.They're in their shells---sleeping.但是大部分时间蜗牛是一动不动的,他们躲在壳里睡觉,故选C.
47.D 词意猜测题.根据后半句:and closes the opening with a thin cover用一个薄薄的壳和外界隔离开来,可以推断出此处句意:蜗牛把身子缩回壳里.故选D.
48.B 细节理解题.根据第三段It can't see very well.它看不太清楚.故选B.
49.D 判断推理题.根据第二段A snail will die in a heavy rain.So whenever it rains,it goes inside its shell house and goes to sleep.大雨可以导致蜗牛死亡.所以不管什么什么下雨,它都躲在壳里睡觉,故选D.
50.A判断推理题.文中第四段And if a snail wears out its teeth,it will grow new ones.如果蜗牛的牙齿掉了,会长出新的,由此得知蜗牛的牙齿会掉的,故选A.
点评 做题时首先要仔细阅读短文,掌握大意,然后结合具体的题目,找出相关信息,就可以确定正确答案.