PartⅤ Key to the Supplementary Practices
Practice 7.1
1.B 2.A 3.C 4.A 5.C 6.D 7.B 8.D 9.B 10.D
11.B 12.D 13.D 14.B 15.D 16.A 17.D 18.A 19.C 20.A
Practice 7.2
1.Antibiotic resistance poses a catastrophic threat to medicine as some infections can no longer be treated.
2.When we first raised the question of reform,among other things,we wanted to reform the medical system.
3.Infectious diseases have played an important role in the history of human and and will likely be important in its future.
4.Illnesses and conditions caused by factors in the environment are collectively called environmental diseases.(https://www.daowen.com)
5.It requires time and increasingly sophisticated research techniques to gain a better understanding of the biological basis for autism.
6.Compared to just about twenty years ago,today more has been known about the relationship between toxins and cancer.
7.Even after years of cleaning,the pollution in this river still remains a concern today.
8.Such cancer cells,for reasons already discussed,are resistant to standard cancer chemotherapies.
9.On a global scale,AIDS may have well risen to become/the leading cause of infant death without the effective intervention.
10.The AIDS death rate in the young adult population has dropped,thanks largely to the fact that a few effective drugs were finally developed.
11.What is very much on the minds of the teachers and the parents is how to avoid the impact on the children of unhealthy information available on the Internet.
12.People who have never had alcohol before,at least as of now,shouldn't start drinking for the sake of health.