The world is not hungry，but it’s thirsty.   1  while we say we are short of water.Why？Because about 97% of water on the earth is sea water which we can‘t drink or use for watering plants directly.Man can only drink and use the 3% of water that comes from rivers and lakes.   2  ，because some of it has been polluted.
　　Now more water is needed.The problem is how we can avoid a serious water shortage in the future.  3 Scientists are making study in this field.Today，In most large cities water is used only once and then runs to the sea or rivers.but it can be used again.Even if every large city reused its water，the water will still not be enough. 4 .
　　The sea seems to give us the best answer.There is a lot of water in the sea.All that needs to be get the salt out of the sea water.This will be expensive，but it has already been used in many parts of the world.   6 So you see，if we can find out a way，we’ll be in no danger of drying up.
从方框中所给的选项中选出能填入空白处的最佳选项，补全短文。其中有一项为多余选项。

First Frenchman: I once heard someone shout, “Look out,” I put my head out of a window and a basin (盆) of water fell on me. It seems that “Look out” may mean “don’t look out.”
　　Second Frenchman: Once I was on a ship and heard the captain (船长) shout, “All hands on deck,” I put my hands on the deck and someone walked on them.
　　Third Frenchman: I once visited an English friend early in the morning and the maid who came to the door and said, “He’s not up yet. Come back in half an hour,” When I went again for him, she said, “He’s not down yet.”
　　“If he’s not up and he’s not down, where is he?” I asked.
She said, “He’s still in bed. When I say ‘He’s not up ’  I mean ‘he has not yet got up’. When I say‘He’s not down ’I mean ‘he has not yet come downstairs.”
【小题1】“Look out”here means “ _______”.

An eight-year-old child heard her parents talking about her little brother. All she knew was that he was very sick and they had no money. Only a very expensive operation(手术) could save him now and there was no one to lend them the money.

　　When she heard her daddy say to her tearful mother， “Only a miracle(something couldn’t happen) can save him now，” the little girl went to her bedroom and pulled her money from its hiding place and counted it carefully.

　　She hurried to a drugstore(药店)with the money in her hand.

　　“And what do you want？” asked the salesman. “ It's for my little brother，” the girl answered. “He's really，really sick and I want to buy a miracle. ”

　　"Pardon？”said the salesman.

　　“My brother Andrew has something bad growing in-side his head and my daddy says only a miracle can save him. So how much does a miracle cost？”“We don't sell a miracle here，child. I'm sorry，”the salesman said with a smile.

　　“Listen，if it isn't enough，I can try and get some more. Just tell me how much it costs. ”

　　A well-dressed man heard it and asked， “What kind of a miracle does your brother need？”　　“I don't know，” she answered with her eyes full of tears. “He's really sick and mum says he needs an operation. But my daddy can't pay for it， so I have brought all my money. ”

　　“How much do you have？” asked the man. “$ 1.11， but I can try and get some more，” she answered.

　　“Well, what luck，”smiled the man. “$ 1.11， the price of a miracle for little brothers. ”

　　He took up the girl's hand and said， “Take me to where you live. I want to see your brother and meet your parents. Let's see if I have the kind of miracle you need. ”

That well-dressed man was Dr. Carlton Armstrong, a famous doctor. The operation was successful and it wasn't long before Andrew was home again.

　　How much did the miracle cost？

1.What was the trouble in the little girl's family？

A. Her brother was seriously ill.

B. They had no money.

C. Nothing could save her brother.

D. Both A and B.

2.In the eye of the little girl,a miracle might be _______.

A．something interesting

B．something beautiful

C．some wonderful medicine

D．some good food

3.What made the miracle happen？

A．The girl's love for her brother.

B．The girl's money.

C．The medicine from the drugstore.

D．Nobody can tell.

4.From the passage we can infer(推断) that _______.

A．The doctor didn't ask for any pay

B．A miracle is sure to happen if you keep on

C．The little girl is lovely but not so clever

D．Andrew was in fact not so sick as they had thought

It seems to be strange to you there is a blind spot(点) on the eyes. Here is an interesting experiment that can make something disappear, when one eye is open.
　　Make a card about the size of a postcard and write two English letters L and R on it, L on the left and R on the right. First, hold the card about 80 cm away and you see both the letters. Then close your right eye and look at the letter R only with your left eye. And now, as you move the card slowly towards you, you’ll find the letter L disappearing. But if you move the card nearer to your face, the letter will be seen again. Now do the same experiment with your left eye closed, you’ll find the letter R disappearing.
Why does the letter disappear? It is because there is a blind spot on the eye. When the image of the letter falls on the blind spot, it won’t be seen. That is why either of the letters disappears.
【小题1】The writer of the passage thinks that _____ there is a blind spot on the eye.