根据以下材料，回答1-20题
Advances in genetic technologies allow scientists to take an unprecedented glimpse into the genetic makeup of every person.The information from this testing can serve many valuable 1 ：It can save lives, assist couples trying to decide whether or not to have children, and help law-enforcement officials solve a crime.2 breakthroughs in genetic testing also 3 some troubling social concerns about privacy and discrimination.4 , if an individual's genetic information becomes widely 5 , it could give health insurers cause to deny coverage to people with certain risk factors or encourage employers to reject certain high-risk job applicants. Furthermore, many genetically 6 problems are more common among certain racial and ethnic groups.Many minority groups fear that the 7 of genetic testing could create whole new 8 of discrimination.
Of particular concern are genetic tests that 9 light on traits such as personality,intelligence, and mental health or potential abilities.Genetic tests that 10 a person is unlikely to get along with other people could be used to limit a person's professional advancement.In other cases, tests that 11 a genetic risk of heart failure could discourage a person12 competing in sports.
New technologies that 13 the manipulation of genes have raised even more disturbing possibilities.Gene therapy advances, which allow scientists to replace 14 genes with normal alleles, give people with typically fatal diseases new hope for healthy lives.15 ,gene therapy has focused on manipulating the genetic material in body cells 16 gametes (the cells involved in reproduction), so the changes will not be 17 to future generations.However, the application of gene therapy techniques to gametes seems 18 .Such manipulation might help prevent the 19 of disease from one generation to another, but it could also 20 unforeseen problems with long-lasting consequences.
第7题答案是

A expansion 

B inflation 

C extension

D verification