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　　Some people have sailed the world in quite small boats. It is not an easy thing 1 . Sometimes the weather 2 bad. That can be the 3 of everyone in it. Accidents can happen 4 .

　　One family once had an accident 5 some big fish. The fish swam 6 their boat and 7 holes in it. Sea water 8 , of course, and the boat soon 9 . However, these people had 10 small boat: a life-boat and they all got into that. They lived and 11 many days. They ate and slept, and they always hoped… At last a ship 12 them.

　　 13 can people live in a very small lifeboat？ Perhaps for weeks or months？ They must be strong 14 every way. They must have hope they must want to live. But you cannot eat and drink 15 .

　　You cannot drink sea water. If you drink a lot of 16 , you will quickly die. Sailors can drink rain water. They must 17 rain water in their boat. They must also catch fish and birds 18 . Lifeboats do not often carry a cooker, so the sailors cannot cook their food. Raw fish and bird meat is not very nice, but there is 19 choice in a lifeboat！ The sailors must eat raw food, or they will die.

　　 20 people think about in a lifeboat？ They think about land, a warm bed, dry clothes, fresh water and food, food, food.

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There is a place on our earth where hot water and steam come up from under the ground．It is a large island in the Pacific Ocean．The island is North Island，in New Zealand．

The planet on which we live is a ball of very hot rock．It is a good thing for us that the outside shell is cold．If it were hot，no one could live here．What if our earth were only as big as an egg? Then the outside part would be as deep as the egg's shell．

The earth's shell has cracks in it in some places．In New Zealand this shell seems to have more cracks than in other places in the earth．There are spots where the ground is so hot that it burns the bottom of your shoes．In some places，hot water shoots into the air from time to time．At other points，you can see steam coming up from pools of hot water．

The people who live in these places make use of the heat coming from inside the earth．

Some of them cook in the hot pools They put food into a basket and place it in the water．Washing clothes is done in the same way．

Many people bring the hot water from below the earth into their homes．They do this by putting a pipe（管子）a hundred feet or more into the ground．In this way they get hot water and steam for cooking and washing，and for healing their homes．

For most of us，the heat under our feet is too far away to us．We must make our heat by burning coal，oil or gas．The people who get heat from inside the earth are lucky．It doesn’t take money to buy for coal，oil or gas．

1．The best title for the passage is ___________．

A．Heat under Your Feet                                  B．Make Use of Heat

C．Coal，Oil，Gas and Heat                            D．Strange Hot Water and Steam

2．Out planet is a ball of __________．

A．hot rock              B．hot water                C．cold rock                      D．hot steam

3．New Zealand has heat coming from the ground in __________．

A．a place                 B．one place                C．two places             D．many places

4．The pools in New Zealand are heated by _________．

A．coal                                                        B．the earth

C．hot rock underground                                 D．the sun

5．In New Zealand the earth's heat ___________．

A．is not used at all                                       B．is put to good use

C．shoots into the air                                      D．hurts many people