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A 27-year-old Chinese citizen found out he had AIDS.Weeks later,he was told he hadDacute lymphoblastic leukemia(急性淋巴细胞白血病).But scientists offered him a ray ofhope:a bone marrow transplant to treat his cancer and an extra experimental treatment to tryto rid his HIV virus.This involved using the gene editing tool CRISPR-Cas9 to delete a geneknown as CCR5 from bone marrow stem cells of the donor before the transplant."After being edited,the cells-and the blood cells they produce-have the ability to resistHIV infection,"lead scientist Deng Hongkui said.People who carry mutated (copiesof CCR5 are highly immune to HIV,because the virus uses a protein made by this gene togain entry into an infected person's cells.A man,known as the Berlin patient,became thefirst person to be cured of HIV in the world after receiving bone marrow transplants fromdonors who had the mutation naturally.The patient agreed and the experiment was carried out in the summer of 2017.It was thefirst time that CRISPR-Cas9 had been used on a HIV patient.In early 2019,nineteen monthsafter the treatment was done,the acute lymphoblastic leukemia was in complete remission(and donor cells carrying the edited gene persisted.But there weren't enough of them toremove the HIV virus in the patient's body.Only approximately 5%to 8%of the patient'sbone marrow cells carried the edited gene.But Deng doesn't see this as a failure."The main purpose of the study was to evaluate thesafety and practicability of genetically edited stem cell transplantation for AIDS treatment,"said Deng.The CCR5 gene mutation has been associated with a 21%increased risk of dyingearly,according to a paper published in Nature,though it's unclear why.China has invested heavily in gene-editing technology,making biotechnology one of thepriorities of its Five-Year Plan announced in 2016.Deng says it could "bring a new dawn"toblood-related diseases such as AIDS,sickle anemia,hemophilia and beta thalassemia and that,thanks to new technology,the goal of a functional cure for AIDS is getting closer and closer.32.How does HIV virus enter a person's cells?A.Through edited CCR5.B.Through a mutated gene.C.Through bone marrow stem cells.D.Through a protein made by CCR5.33.What can be learned from Deng's study?A.Researchers failed to rid HIV virus completely from the patient.fail to ooB.CRISPR-Cas9 has been used on different HIV patients.C.Cells with genetic mutation can resist HIV infection.永能做到D.Scientists deleted CCR5 from stem cells of the patient.系器雅B.It is supported by the government.C.It helps cure blood-related diseases efficiently.D.It continues to perform well in clinical tests.35.What is the text mainly about?A.The origin and treatment of AIDS.B.The key to AIDS treatment.C.The introduction of gene-editing technology.D.The first person cured of HIV.第二节（共5小题；每小题2分，满分1●分）根据短文内容，从短文后的选项中选出能填人空白处的最佳选项。选项中有两项为多余选项。Nowadays the benefits of telecommuting(远程办公)and remote work are obvious.36.How can you help remote workers feel connected and fully part of your team whenthey're not physically present?Vide5 mot the nemy.身4上37 DThough some workers weren't fully engaged during a conference call,it will【2022高三单元卷·英语（二十）第5页（共8页）QGX】