Directions: Read the following text and choose the most suitable heading from A-F for each paragraph. There is one extra heading which you do not need．
A．Ways to beautify eyes
B．Proper use of eye contact
C．Techniques of sending eye signals
D．Colours of people’s eyes
E．Functions of different parts of the eye
F．Variety of messages conveyed through eyes
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80．
小题1:
The coloured part of the eye is called the iris. There are three basic eye colours-brown, blue and green. A few albino people have red or pink eyes, but these are very rare. Many people believe that blue eyes are more delicate than brown eyes. In fact they are just as tough as brown eyes, although they. are more sensitive to light.
小题2: We only see part of the eyeball, although the whole eye is as big as a table tennis ball. Light enters the eye through the pupil and passes through the lens. The lens focuses the light onto the retina at the back of the eye. The retina sends the signal to the brain along the optic nerve. The image on the retina is actually upside-down, but the brain corrects it. As we get older our eyesight becomes worse. This happens because the lens isn’t as flexible as when we are young and the eye muscles are weaker.
小题3: Our eyes are the most important of our five senses. We receive 80% of our information about the world through our eyes. We also send signals to other people with our eyes. Some eye signals are unconscious. When we look at something nice, our pupils get bigger. But when we don’t like something, they become smaller. We cry when we are unhappy and sometimes when we are very happy. But we can also control some eye signals. For example, we can wink at someone or raise an eyebrow. Sunglasses make someone appear mysterious or dangerous, because they hide that eyes and so we can’t see the signals.
小题4: We find large eyes more attractive. Children have large eyes in proportion to their heads. Cartoon characters always have large eyes, too. We can’t actually change our eyes, but we can make them look bigger with make-up. Eye make-up isn’t new. Pictures in the Pyramids show that the ancient Egyptians both men and women-used it. False eyelashes can make eyelashes longer. Eye shadow on the eyelids can make the eyes look bigger and more dramatic．Glasses can also make eyes look bigger.
小题5: We do not normally look into someone’s eyes for long, especially when they are very close. Eye contact can be very threatening, so people only do it when they want to threaten someone. It is also very intimate. This is why lovers gaze into each other’s eyes. It’s also why people don’t look at each other in lifts.