For years scientists have been arguing about whether nature or nurture (后天) decides what people will be like. Is it nature— what people are (41) with— that decides what they will be like? (42) is it nurture —what(43) to people when they are born —that decides what they will be like?
Scientists have been studying twins to (44) if they can find the answer, because twins start out with the (45) DNA. Sometimes twins don’t live together at birth and grow up in different (46) and different places— so the nature is the same for both, but the nurture is different.
When scientists (47) these twins in their later life, they some times find some surprising (48).
Jim Springer and Jim Lewis were adopted（收养）by two different families at birth. They first met each other again thirty-nine years (49) and discovered they had a lot in (50). Both had been (51) twice. Their first wives were both named Linda and their second wives were both named Betty!
Each twin had a son — one called his son James Alan and the (52) called his son James Alan, too. Their children each had a dog called “Toy”. They even arrived at their first (53) in the same color of car.
So far twin (54) seem to show that both nature and nurture are important. What we have from birth, and how and where we live help to build (55) we are.
1.A. born B. grown C. taught D. made
2.A. So B. And C. If D. Or
3.A. pretends B. happens C. falls D. depends
4.A. hear B. win C. see D. plan
5.A. nice B. same C. full D. free
6.A. families B. cities C. countries D. nations
7.A. believe B. suggest C. receive D. compare
8.A. numbers B. discoveries C. results D. decisions
9.A. ago B. later C. forward D. behind
10.A. common B. fact C. danger D. trouble
11.A. mentioned B. married C. succeeded D. interviewed
12.A. either B. else C. other D. only
13.A. competition B. education C. purpose D. meeting
14.A. studies B. movies C. challenges D. mysteries
15.A. what B. when C. where D. who
According to the latest reports on TV and in the newspaper, food safety is becoming a ____________ serious worldwide problem.
A. more and more B. little by little C. now and then D. one by one
Drugs can do great harm (危害) not only to you but also to your family. You must be _________them.
A. along with B. out of C. in front of D. away from
—You’re supposed to hand in the travel diary as soon as possible.
—I see. I’m going to _________until 11:30 pm once more.
A. cheer up B. put up C. turn up D. stay up
—It has been written into law that drink driving can be a crime(罪).
—I quite agree. We should better be careful not to _____________the law.
A. test B. cheat C. break D. deal
—I can’t even afford to buy a small house.
—Me neither. The house price still keeps_____________!
A. moving B. rising C. dropping D. adding
