C 
People have sailed （航行）the world in quite small boats . It is not an easy thing to do. Sometimes the weather gets bad. That can be the end of everyone in it. Accidents can happen easily and quickly .
One family once had an accident with some big fish. The fish swam under their boat and bit（咬）holes in it. Sea water came in, of course , and the boat soon sank （下沉）. However, these people had another smaller boat----a life-boat, and they all got into that. They lived and hoped for many days. They ate and slept, and they always hoped…At last a ship found them .
How do people live in a very small life-boat? Perhaps for weeks or months? They must be strong in every way . They must have hope----they must want to live: But you cannot eat and drink hope.
You cannot drink sea water: Drink a lot of sea water and you will quickly die . Sailors （水手）can drink rain water. They must catch rain water in their boat. They must also catch fish and birds for food . Life-boats do not often carry a cooker, so the sailors cannot cook their food. Raw （生的）fish and bird-meat is not very nice . But in a life-boat the sailors must eat raw food, or they will die.
What do people think about in a life-boat? They think about land , a warm bed, dry clothes , fresh water and food , food , food .
11．When sailors' boat sinks, their life-boat gives them ______.  
A．food         B．beds        C．rain water        D．hope
12．One family once had an accident at sea, because ______       
A．their boat was caught in bad weather
B．the boat knocked against a rock and sea water came in
C．some fish bit through the bottom（底部）of their boat
D．none of them knew how to sail the sea
13．Sailors can catch ______ for food and drink at sea in a life-boat .    
A．rain water                                     B．fish and birds
C．both sea water and rain water         D．both A and B
14．Life-boats do not often carry a cooker, which is ______.  
A．something used for cooking  B．food for cooking
C．a large basin  D．a person who cooks food
15．Which of the following is NOT TRUE?       
A．Sailing around the world in quite small boats is not easy.
B．All the food sailors have in a life-boat is cooked fish and bird-meat.
C．Anyone who drinks a lot of sea water will die .
D．No one can live for weeks in a life-boat unless he is strong and wants to live .