当代研究生英语读写教程完形下册(2)

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Recent studies of the human brain have resulted in some interesting discoveries. Scientists believe that a way to improve the power of the brain may soon be possible.

Scientists have 1.discovered that the brain can make its own drugs. The brain contains a protein 2.substance which can act directly 3.on the brain to change aspects of mental activity. Some may change or improve, for example, 4.creativity, intelligence, imagination, and good memory.

Chemicals found in the brain 5.carry messages .In recent years scientists have found chemicals that 6.affect mood, memory and other happenings of the 7. mind .About 25 have been found 8.so far .

Today the role of 9.chemicals and protein substance in human behaviour is creating much 10.interest .Research seems to show that they may help 11.control insomnia, pain, and mental illness .They have a great capacity to 12.stimulate the brain to conquer deficiencies. 13.They also improve the qualities of memory and 14.learning already in the brain .They hold the secret to mood and emotion. Some day there may be a chemical way to create a better more 15.efficient brain.