____________ You depend on them every day. They tell you where you are and what is going on around you_______________
Try to imagine for a minute that you are suddenly unable to use your senses. Imagine, for example, that you are in a cave and your only source of light is a candle. Without warning, the wind blows out the fire.
___________ Your eyes let you read a book. Your nose brings the smell of dinner. Your hand feels the softness as you touch a cat. Your ears tell you that a storm is coming.
___________ They warn you if you touch something that will burn you. They keep you from looking at a light that is too bright, and they tell you if a car is coming up behind you. Each of your senses collects information and sends it as a massage to your brain. The brain is like the control center for your body. It sorts out the messages sent by your senses and acts on them.
阅读上面材料， 把A-D四个句子填入文中空缺处，使材料内容完整正确，然后回答第5题。

A.Your senses are always at work. B.Your senses are sight, hearing, touch, smell and taste. C.Your senses also help keep you from harm. D.Your senses are very important to you.

Which of the following is the main idea of this passage?

A．Your senses are very useful to you sometimes.

B．Your senses are parts of your body.

C．Your eyes are the most important to you.

D．Your senses are very important to you.