题目

完形填空 Man has five senses(感官): sight, hearing, ____1___, taste and touch. They ___2___ information for the brain(大脑). For example, the eyes collect information __3___ pictures and the ears collect information on __4___. Sight ___5___ of a human's two eyes has an eyelid(眼皮) and an eyebrow(眉毛). They protect the eyes. The eyes can only see with light. Light ___6___ the picture of something into the eyes so the human can see it. Hearing Sounds travel ____7__ the air like waves (波). They are called sound waves. Human ears ___8____ cups. They catch these waves for the brain and the brain changes them into different sounds. Sound waves are much slower than light. So you always see lightning first and then you ___9___ the thunder.(雷声) Smell Humans smell with their __10__. Most people can __11___ about 10,000 kinds of smell. This is amazing! But dogs can smell 1,000 times better than humans. Humans have five million receptor cells (接受细胞). ___12___, dogs have two hundred million! Taste People can taste food because they have taste buds (味蕾) on their tongues. There are about 10,000 taste buds. Old taste buds die and new ones ____13____ every two weeks. But when people get older, this happens less often. Touch There are receptor cells for the sense of touch all over the body. This is different from ___14____ four senses. Touch receptor cells are in the lowest part of the skin. They help the body to have all kinds of feelings like pain, cold and heat. Some parts of the body (like the fingertips) are more sensitive than other parts of the body (like the back) because they have more ____15___ receptor cells.  1. A. listen                    B. touch                C. smell                        D. see     2. A. collect                  B. give                  C. throw                      D. teach 3. A. in                         B. through             C. from                        D. on 4. A. noises                   B. voices               C. sounds                            D. feelings 5. A. All                        B. Every                C. Each                        D. None 6. A. carries                  B. carry                 C. to carry                   D. carrying 7. A. on                        B. in                      C. through                    D. of 8. A. are like                 B. like                   C. don’t like                  D. enjoy 9. A. smell                    B. taste                  C. hear                         D. touch 10. A. eyes                   B. noses                C. ears                         D. hands 11. A. tell                      B. speak                C. talk                          D. explain 12. A. However             B. And                   C. So                           D. But 13. A. come across        B. come in             C. come through           D. come out 14. A. others                 B. another              C. the other                  D. other 15. A. touch                  B. smell                 C. hearing                     D. taste 答案：1C 2A 3D 4C 5C 6A 7C 8A 9C 10B 11A 12A 13D 14C 15A

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