What do you do if you're stranded（处于困境的）on a lonely island? Surely you need to find a way to get in touch with the outside world. Your best chance of doing this is to draw the attention of a passing plane.
　　Body signals（信号）
　　Pilots from different countries understand body signals if they have the correct training. When you wave your arms up and down in a straight line, it means "yes". When you point downwards and swing your arm from side to side, it means "no". If you want the pilot to know that it's safe to land, push your hands out in front of you and bend（弯曲）your knees. If you want to say that it's not safe to land, put your arms in the air and move them to one side.
　　Smoke signals
　　The smoke from a fire can be seen from far away, so it's a good way to draw attention. If the weather is dry, it isn't hard to start a fire. Remember, however, that fires can be very dangerous if they get out of control. Never light a fire unless you're sure that it can't spread. If the ground is dark, light smoke can be seen more easily. Green grass and leaves produce light smoke.
　　Ground-to-air signals
　　It's a good idea to build some signals, too. Use large pieces of wood to make the symbols(标记). If you can't find any wood, use earth. Some useful symbols are:
　　F "I need food and water."
　　II "I need medicine."
　　I "I am badly hurt."
　　X" I am unable to move from here."
　　Pilots' replies
　　If the pilot lowers the plane's wings from side to side, this means "message received and understood". (At night, the pilot flashes the plane's green lights.) If the pilots flies the plane in a clockwise circle, this means "message received but not understood".(At night, the pilot flashes the plane's red lights.)
However, there is no signal which means "message not received". Why not?
【小题1】 Which picture means "it's not safe land"?

　
【小题2】 What can we learn from the passage?

Time flies! We become mature(成熟的) girls or boys, or at least we   56 __we are. At the same time, our parents are no longer young. They   57 __all to us but never look forward to getting anything back. When we are ill in bed, they stay   58 __ us day and night. When we’re hungry, cold or sad, they always offer    59 __.
But what have we done for our parents?   60 __we grow up, we have our own ideas and we believe we are   61 __enough to think and act by ourselves. So we usually dislike their care.  Sometimes we don't listen to them and sometimes even   62 __ them.
We must doing something now, letting them know that we    63 __them, too. We should try our best to understand our parents, and not to make them feel hopeless. In a word, it’s our duty to bring   64 __ to them because that is the sign that we are really mature.
Children are parents’ hopes and we are carrying both our dreams and    65 __.
The happiness of our parents is what we should try to achieve.

If you put a buzzard(秃鹰) in a cage without a roof(顶棚), the bird will be a prisoner. Even though it can fly, it can’t fly through the open roof. The reason is that a buzzard always begins a flight from the ground with a run of 3 or 4 meters. Without space to run, he will not even try to fly, but will stay in his small jail(监牢) for the rest of his life.
The ordinary bat that flies around at night cannot take off from the ground. If it is placed on the ground, all it can do is shuffle(穿梭) about helplessly. If it reaches a higher place, it will be able to throw itself into the air. Then it takes off quickly. But on flat ground, it will never fly.
A bee dropped into a cup will be there until it dies, unless it is taken out. It never sees the means of escape at the top, but keeps trying to find some way out through the sides near the bottom. It will look for away where none exists, until it completely destroys itself.
In many ways, there are lots of people like the buzzard, the bat and the bee. They are struggling with all their problems and frustrations(挫折)，not realizing that the answer is right there above them.
【小题1】A buzzard can’t fly through the open roof of a cage because       .