第二篇：
Scientists have discovered dozens of genetic variations that decide how tall we are, which can help us understand why
humans are so different from one another. The discovery could also lead to new treatments for growth disorders as well as
many other conditions 36 heart disease, cancer and diabetes. Professor Guillaume Lettre, of Montreal University in
Canada, said: “Of these 83 genetic variations, some influence adult height 37 more than two centimeters, which is
enormous.”
Height is mostly determined in our DNA—children from tall parents tend to grow up to be taller, and 38 from
short parents are shorter. But growth from a small baby into an adult, and the role of genetics, is one of the most poorly
understood areas of human biology. According to Professor Lettre, the identified genes will be helpful in 39 a
person’s risk of developing certain growth disorders. There is also the hope that scientists may 40 be able to use this
knowledge to develop a new medicine for growth disorders.
【題組】38. (A)which (B) those (C) they (D) whom
Liz 大一上 (2017/11/30) Height is mostly determined in our DNA—children from tall parents tend to grow up to be taller, and 38 from short parents are shorter.
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