Linda and David have traveled by air from London to Sydney, Australia. Linda has promised her mother that she will ring her to let her know that they have arrived safely. This is something she had done ever since she was a child. David thinks it is not a good idea to ring so far, to spend too much, and to say so little.

“If there were an accident.” He says, “they’d know soon enough. Bad news travels fast.”

“If you’re on that telephone for less than one minute, I’ll eat my hat,” David says, “And one minute’s nearly four pounds. ”

“That‘s no more than you’d pay for a new hat,” Linda answers. She has asked the man at the hotel desk to get her the number. The telephone rings. Linda picks it up.

“Hello, Mum. Is that you ?” She says.

“Six pence per second,” David reminds(提醒) her.

“Hello, love. ” It is Mrs Lee, Linda’s mother, speaking from London. “I can hear you very clearly just like you are in the next room. It’s a better line than when you called me from your office. Do you remember? I shouted at that time, and still you couldn’t hear me sometimes. ”

“Yes, Mum. ” Linda puts in. “I just wanted to ring to …”

“I remember how you rang when you went to Betty’s house to eat, when you were a little girl. And then when you …”. Mrs Lee is a great talker.

“Nearly four pounds. ” says David.

Linda tries to tell her mother that it is time to say goodbye.

“Yes, all right, ” says Mrs Lee, “But you will write, won’t you, as you did when you were at work …”.

Once again, Mrs Lee talks about the pass. and there is no stopping her.

“Four pounds fifty, ” says David.

At last, Linda cuts her mother short, promises to write, and rings off.

       “There! That wasn‘t long, was it ?”

       “Four pounds, ninety pence.” David answers. “And you didn’t even say that we’ve arrived.”

“Cool”is a word with many meanings．Its old meaning is used to express a temperature that is a little bit cold. As the world has changed, the word has had many different meaning．

“Cool”can be used to express feelings of interest in almost anything. When you see a famous car in the street，maybe you will say，“It’s cool．”You may think，“He’s so cool，”when you see your favorite footballer．We all maximize（扩大） the meaning of“cool”．You can use it instead of many words such as “new” or “surprising”．Here’s an interesting story we can use to show the way the word is used．A teacher asked her students to write about the waterfall（瀑布）they had visited．On one student’s paper was just the one sentence，“It’s so cool．Maybe he thought it was the best way to show what he saw and felt．

But the story also shows a scarcity（缺乏）of words．Without “cool”，some people have no words to show the same meaning．So it is quite important to keep some credibility（可信性）．Can you think of many other words that make your life as colorful as the word “cool”？ I can．And I think they are also very cool．

The ocean is home to tens of thousands of fish. You can see fish swimming freely in the water. But you may not know that fish cannot explore every part of the ocean.

Recent studies have found that the deepest depth a fish can swim is 8,200 meters. This is about three quarters of the depth of the deepest part of the ocean. This is because of a chemical（化学物质）in fishes’ cells that is called trimethylamine n-oxide（TMAO）.

For example, if you take a ping-pong ball 10 meters underwater, the pressure turns it into a tiny piece of plastic. Most things break down after a certain depth underwater because of the high pressure.

TMAO warns fish of this danger at about 8,200 meters. If fish swim deeper, the TMAO chemical stops working and starts to damage the fishes’ brain cells.

Although there is life at the bottom of the sea, most fish live within the top 1,000 meters of the ocean. Even sharks, which are often described as the “kings of the ocean” have never swum deeper than 4,000 meters, not even half the depth of the ocean.

Deeper down in the ocean, the most dangerous animals are the deep-sea fish. The anglerfish is one such fish. It lives about 2,000 meters deep in the ocean. There is no sunlight at this depth. But anglerfish can produce light themselves. They use this light to find food.

Below even these fish is the cusk-eel. These small fish live close to the ocean floor at a depth of 8,000 meters, far out of reach of hungry predators（猎食者）.

What do you read when you are travelling by train or bus?

What are other p    71     reading? Perhaps a woman sitting near you is reading a romantic novel. A man is reading a serious biography about a politician. And there’s a student reading an English t    72    .

What do their choices say about them? Do you judge them by what they are reading?

I have got to tell you that your impressions of them are p    73     completely wrong. The woman reading the romantic novel could be a lawyer. She just wants a light read to let her mind have a short r    74    .

The man reading the biography wants you to think that he is an intellectual, but he is just showing off. The student reading the textbook isn’t a student at a    75    . She’s an English teacher.

Publishers know that some people are self-conscious about（对……感到难为情）what they read on p    76     transport and so they put out different versions（版本）of a cover. For example, books about Harry Potter have an original cover for young readers and then another more serious version for a    77    .

So next time you are on a train, look a    78     and see what other people are reading, but don’t make any conclusions quickly. You will probably be w    79    .

Here is a situation where you could say, “Don’t judge a book by its c    80    ”.