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Many people are disturbed by the genetic diversity of cancers — an inevitable
Many people are disturbed by the genetic diversity of cancers — an inevitable
游客
2025-03-26
16
管理
问题
Many people are disturbed by the genetic diversity of cancers — an inevitable consequence of random evolution. Cancer therapies【C1】______be applied fairly randomly or carelessly, but nowadays many believe that effective therapies need to be【C2】______and tailored to genetic faults in each individual’s cancer.
However, a personalized treatment disregards the most fundamental reason why it is difficult to cure cancers【C3】______: cancer cells adapt and evolve【C4】______treatment. Even drugs that are initially effective often have a【C5】______diminishing effect, as the biological systems blocked by the treatment spontaneously compensate【C6】______re-routing the cancer cells’ internal wiring,【C7】______the cancer’s ability to spread. To use an【C8】______, traffic hot spots in towns can cause major traffic jams, but smart drivers will quickly find other short cuts. Then, in the absence of "short cuts", evolution【C9】______: naturally arising mutant cancer cells that are【C10】______the targeted drug rapidly outgrow their disabled siblings and cancer comes back. [br] 【C1】
选项
A、had better
B、would rather
C、used to
D、were to
答案
C
解析
如果癌症的治疗方案很随意、粗心,效果肯定差,所以不宜选择had better或would rather,而且这两个词组的主语通常是有生命的。同学们比较熟悉be to do…的用法,但也很少用。…was(were)to do…不单纯是be to do…的过去时,有时还有另外一个意义,表示“后来的结果”,如…an event in the 1930s that was to change the world。根据后面句子的含义,不宜选择were to,与nowadays矛盾,而used to表示“过去是……”,与nowadays形成对比。
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