________you ________your watch? No, ________.

1. A.
   Did, find out, I didn't
2. B.
   Have, found, not yet
3. C.
   Have, looked for, I haven't
4. D.
   Did, find, not yet

________you ________your watch?

No, ________.

[　　]

A．Did, find out, I didn't

B．Have, found, not yet

C．Have, looked for, I haven't

D．Did, find, not yet

If you watch the sky about an hour after the sun goes down, you may see some “moving stars” ．But they’re not real stars．They are man-made satellites．And the biggest of all is the International Space Station（ISS国际空间站）．

From now until July is the best season to watch the ISS flying over the earth, and people can see it just with their eyes．The ISS is the biggest man-made satellite because scientists want to live on it．They think that the best way to learn more about space is to live there．

When the space station is finished, it will be like a city in space．People will stay an study there with many of the things they have at home．Laboratories, living rooms and power stations are being built．The ISS is the most ambitious（雄心勃勃） and expensive space program ever．Billions of dollars are being spent on it every year．

Scientists hope that the ISS will be a stepping-stone（垫脚石） for future space explanation．“The ISS will help us better understand the human body, explore space and study the earth, It can help us make life on the earth better,” said Kathryn Clark , an ISS scientist．

China is not an ISS country, but it has helped with some of the experiments．China sent some rice up to the ISS to find out what space would do to it．

The ISS is not finished yet．More than 100 parts need to be put on．Scientists hope it will be finished as soon as possible．After it’s finished, more than 90%of the world’s population will be able to see the Space Station．So keep looking up, and maybe you’ll see it get bigger．

1．The ISS is ______．

       A．a world power station                                 B．a man-made satellite

       C．an outer space moving star                          D．a stepping-stone to the sun

2．You can watch the International Space Station with your eyes _________．

       A．an hour before sunset                                  B．while flying on the earth

C．in a special room                                        D．from now till July

3．The ISS is in fact regarded as _______ for space exploration．

       A．a laboratory            B．a city                      C．a living room           D．a museum

4．The passage tells us that ________．

       A．China belongs to the ISS

       B．to build the ISS will cost less in the future

       C．China did some research on wheat through the ISS

       D．the best way to learn more about space is to live on the ISS

He does not know what he is doing，but he breathes(呼吸)as well as the oldest and cleverest man in the world．He began to breathe when he was born，and he will not stop until he dies，still he does it without thinking about it．

See how long you can hold your breath．

In some places men dive(潜水)in the sea for pearls (珍珠)．They pick up shells(贝壳)that hold the pearls，and the longer they stay under water，the more pearls they can find．For the reason(原因)they hold their breath as long as they possibly can．Yet even these pearl divers can't go without breathing for a long time．

Watch to see how many times a man draws his breath every minute．Some men breathe fifteen times a minute．An elephant breathes only eight times．It was told that a mouse breathes a hundred and twenty times each minute．

No one needs to tell us that what we breathe every minute of every day is air．It is around us everywhere，like wonderful sea that we can not see．

1．Everyone began to breathe ________． (　)

A．when he is old

B．when he is clever

C．when he was born

D．when he was a child

2．What do the men dive in the deep sea for? (　)

A．They want to hold their breath．

B．They want to make their bodies stronger．

C．They want to find pearls．

D．They want to find reasons for breath．

3．A mouse breathes ________ times more than an elephant every minute． (　)

A．105

B．120

C．112

D．15

4．The word “It” in the last paragraph(段)means ________． (　)

A．wonderful sea

B．air

C．a mouse

D．an elephant

5．Which of the following is NOT TRUE in thepassage? (　)

A．We can't live without air．

B．The babies also need to breathe．

C．The dead also need to breathe．

D．Animals need to breathe every minute．