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fish(河豚) would have to be a strong competitor.Not only is it poisonous-though that doesn't stop
people trying to eat it-and able to scare off other creatures in the sea by inflating itself to become much
larger than normal, but also it chews on its own brothers and sisters when it is young.
Puffers attach their eggs to rocks near the bottom of the sea, often at the mouths of bays.Then the
larvae(幼鱼)move to the wide part of the river once they have grown a little.Having put on more
weight, they head for the sea.It's no childhood for the puffer fish, though, as Shin Oikawa and his
colleagues found when they hatched puffer larvae in the lab and monitored them for two months.They
found the larvae went through three step changes when they reached body weights of 0.002 grams,
0.01g and 0.1g.When a larva went through one of these changes, its behavior also changed.For instance,
once a larva passed the first level it would grow its first teeth and could start attacking the larvae that had
not reached that stage.Similarly, any larva that had reached the 0.01g or 0.1g levels would start attacking
the larvae that hadn't.
The baby fish had a "relatively small mouth", so rather than swallow their brothers and sisters whole,
they would bite pieces out of them.Despite this limitation, the fish caused plenty of deaths.
Eat one puffer and the poison will paralyze your muscles, including the muscles responsible for breathing
－so death is usually caused for lack of oxygen.Famously, the fish is a delicious dish in Japan, where
highly qualified chefs produce dishes that contain safe levels of the poison.The puffer does not go to the
trouble of producing poison itself.Instead, it hosts bacteria that combine the poison.It obtains these
bacteria from its diet, so the youngest adult fish are not poisonous.
1. The following statements account for the violence of puffers EXCEPT ________.
A. they often prevent people from capturing them
B. they can become larger to frighten enemies away
C. they kill their younger companions after growing older
D. they can poison people who try to eat them
2. We can learn from the second paragraph that the puffer ________.
A. can mostly grow to the weight of 0.1g gram
B. never changes its behavior as it grows
C. often finds safe places to have its next generation
D. begins to grow teeth when it reaches the second level
3. Where does the poison in the puffer's body come from?
A. Its inner organism.
B. The chemicals in the water.
C. The diet it eats.
D. Small fish around it.
4. It can be inferred from the last paragraph that ________.
A. the puffer does produce poison all by itself
B. people like eating puffers though they are poisonous
C. people can eat the puffer prepared by themselves
D. fishermen often capture the youngest adult puffers
I take the firm position that parents do not owe their children a college education. If they can __1 it, they can certainly send them to the best universities. But they must not feel guilty if they can’t. If the children really want to go, they’ll find a 2 out. There are plenty of loans（货款）and scholarships for the bright and 3 ones who can’t afford to pay.
When children grow up and want to get married, their parents do not owe them a down payment on a house. They do not have the 4 to baby-sit their grandchildren. If they want to do it,it must be considered a(n) 5 not an obligation（责任，义务）.
Do parents owe their children anything? Yes,they owe them a great deal.
One of their obligations is to give their children personal 6 .A child who is constantly made to feel stupid and unworthy, constantly 7 to brighter brothers, sisters, or cousins will become so _8_ , so afraid of failing that he（or she）won’t try at all .Of course they should be __9__ corrected when they do wrong, but it’s often better to let children learn their mistakes by themselves in time.All our parents should do is to trust them, respect them, tolerate（宽容）them and give them chances to try and fail.They must learn to stand 10 .When criticisms（批评）are really needed,they should be 11 with praises,with a smile and a kiss.That is the way children learn.
Parents owe their children a set of solid values around which to build their lives.This means teaching them to 12 the rights and opinions of others;it means being respectful to elders,to teachers,and to the law.The best way to teach such values is by 13 .A child who is lied to will lie.A child who sees no laughter and no love in the home will have 14 laughing and loving.
No child asks to be 15 .If you bring a life into the world,you owe the child something.
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I take the firm position that parents do not owe their children a college education. If they can __1 it, they can certainly send them to the best universities. But they must not feel guilty if they can’t. If the children really want to go, they’ll find a 2 out. There are plenty of loans（货款）and scholarships for the bright and 3 ones who can’t afford to pay.
When children grow up and want to get married, their parents do not owe them a down payment on a house. They do not have the 4 to baby-sit their grandchildren. If they want to do it,it must be considered a(n) 5 not an obligation（责任，义务）.
Do parents owe their children anything? Yes,they owe them a great deal.
One of their obligations is to give their children personal 6 .A child who is constantly made to feel stupid and unworthy, constantly 7 to brighter brothers, sisters, or cousins will become so _8_ , so afraid of failing that he（or she）won’t try at all .Of course they should be __9__ corrected when they do wrong, but it’s often better to let children learn their mistakes by themselves in time.All our parents should do is to trust them, respect them, tolerate（宽容）them and give them chances to try and fail.They must learn to stand 10 .When criticisms（批评）are really needed,they should be 11 with praises,with a smile and a kiss.That is the way children learn.
Parents owe their children a set of solid values around which to build their lives.This means teaching them to 12 the rights and opinions of others;it means being respectful to elders,to teachers,and to the law.The best way to teach such values is by 13 .A child who is lied to will lie.A child who sees no laughter and no love in the home will have 14 laughing and loving.
No child asks to be 15 .If you bring a life into the world,you owe the child something.
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