Chineseacupuncturewasdevelopmentasearlyas2000BC.Thereis...

问题详情：

Chinese acupuncture was development as early as 2000 BC. There is evidence 61       acupuncture began during the Stone Age, 62        stone tools called bian were used to press areas of the body.

As acupuncture developed, the simple bian stones 63        (replace) by stone needles. Eventually, metal needles began to appear and took 64         place.

How acupuncture reduces pain is not clear. One theory 65        (explain) this phenomenon suggests that acupuncture 66        (block) pain signals from reaching the brain.

67        theory relates acupuncture to the production of chemicals in the body which reduce pain. A lot of people now subscribe 68         these theories.

Acupuncture is a unique 69         (contribute) of traditional Chinese medicine, and has spread to many other countries. You can now find many 70        (acupuncture) in many different countries.

【回答】

61. that  62. when 63. were replaced  64. their   65. explaining   66. blocks

67. Another   68. to    69. contribution    70. acupuncturists

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