必修三 unit 7(二） 2021届 高三北师大版英语一轮复习课时练习

高考提能练(十四)　必修3　Unit 7　The Sea Ⅰ.阅读理解 A (2019·郑州市高三第三次质量预测) For as long as we’ve known about it，humans have searched for a cure for cancer.Across the world，countless amounts of time and money have been spent on researching a way to stop this terrible disease.But now，it seems like the answer could have been inside our own bodies the whole time. Recently，the Food and Drug Administration (FDA) in the US，a government agency that’s responsible for health care，approved a new form of gene therapy that could mean the end of a certain type of cancer. The therapy allows scientists to “train” the immune(有免疫力的) cells of sick patients to fight leukemia—a form of blood cancer that mostly affects young people. The exciting new treatment works by removing healthy immune cells from the patient，known as T­cells，which are then changed to be able to “hunt down” cancer cells. The cells are then put back into the patient before they begin to get rid of the patient’s leukemia over time，similar to how the body