My mother is a geneticist, and from her I learned that despite our differences in size, shape and color, we humans are 99.9 percent the same. It is in our   36    to see differences: skin, hair and eye color, height, language. But also in our nature, way down in the DNA that   37   us human, we are almost the   38  .
I believe there is more that unites us than   39   us.
My mother came to the US from India. She is   40   enough that she got her service  41  in a diner in 1960s Dallas. My father is a white boy from Indiana whose   42   came from Germany in the mid-1800s.
It seems   43   to admit now, but I never   44   that my parents were different colors. One day, I watched my parents walk   45   the street of our church together. They were   46   in the service that day, and as they walked, I saw their hands   47   together in unison(一致地). I noticed for the first time how dark my mother was, and how white my father was. I knew them as my parents   48   I realized their skin color. I'm sorry to say that now when I see a mixed-race    49   walking down the street, I see the "mixed race" first and the "couple" second.
When my parents married in 1966, there were   50   places in this country that had laws  51   mixed marriage.   52  , my white grandfather,   53   father had been a typical racist, was not against their marriage.
Some of us are men, some are women. Some are young, some old. Some of us are short and others   54  . Some right-handed, some left-handed. We have lots of differences; we are all  55  . But deep down inside us, down in our DNA, we are 99.9 percent the same. And I believe we need to remember that.

A．feature B．character C．nature D．quality

A．gets B．lets C．has D．makes

A．same B．different C．familiar D．similar

A．differs B．divides C．departs D．splits

A．yellow B．white C．dark D．brown

A．turned out B．turned down C．turned over D．turned back

A．ancestors B．parents C．family D．origin

A．silly B．wise C．stupid D．foolish

A．noticed B．looked C．watched D．observed

A．in B．up C．out D．down

A．entering B．running C．attending D．participating

A．rocking B．shaking C．swinging D．waving

A．unless B．after C．before D．until

A．marriage B．couple C．double D．twins

A．always B．also C．almost D．still

A．allowing B．preventing C．encouraging D．banning

A．Therefore B．However C．But D．Otherwise

A．which B．whose C．that D．what

A．long B．high C．tall D．kind

A．similar B．familiar C．unique D．same