Ⅱ、文意選填：佔10分（共5題，每題2分） Choose the best answer to fill in each blank below. (AB) besides (AC) where (AD) ever (AE) come about (BC) unique(BD) prevailing (BE) fade away (CD) since (CE) formidable (DE) yet(ABC) thus (ABD) innovative (ABE) typical       A new strain of Omicron, called XE, was first detected in England in mid-January,according to the U.K. Health Security Agency (UKHSA), and has been confirmed in more than600 cases in England ____7____, less than 1% of virus samples analyzed during that time. Upto now, in addition to cases of XE in England, a very limited number of cases have reportedlybeen found in China, Thailand and India.        XE is a recombinant virus—effectively a combination of genetic material from two ormore different viruses—containing elements of the original omicron strain, BA.1, and the moreinfectious BA.2 subvariant, also known as “stealth omicron.” Early data from the UKHSA andWHO suggests the XE variant could be around 10% more transmissible than the BA.2 omicronsubvariant, one of the most contagious diseases in human history.       Susan Hopkins, chief medical adviser for UKHSA, said more data will be needed toconfirm whether XE has a “true growth advantage,” as it has shown a “variable growth rate” sofar over the time it has been monitored. The WHO states in an April 5th report, “TheSARS-CoV-2 virus continues to evolve. Given the current high level of transmissionworldwide, it is likely that further variants, including recombinants, will continue to emerge.Recombination is ____8____ among coronaviruses and is regarded as an expectedmutational event.” Many of these changes are the result of genetic mutation but some majorchanges can ____9____when a person is infected with more than one type of virus. When thishappens, viruses can exchange and swap parts of their genetic makeup as they replicate insideour cells, effectively creating a hybrid with elements of both “parents.” “Recombinant virusesare not an unusual occurrence； particularly when there are several variants in circulation.”Hopkins said.        New variants can possibly evade ____10____vaccines and treatments for Covid-19. Forexample, both BA.1 and BA.2 are resistant to most monoclonal antibody treatments,____11____ more data will be needed to confirm whether XE is able to evade these treatments.“There is also insufficient evidence to draw any conclusion on transmissibility, severity orvaccine effectiveness,” Hopkins said, adding that “ the UKHSA will continue to monitor thesituation closely.”A new strain of Omicron, called XE, was first detected in England in mid-January,according to the U.K. Health Security Agency (UKHSA), and has been confirmed in more than
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