2. 医学
  3. The first attempts at gene therapy have mostly______, but technique will surely be made to work eventually.

The first attempts at gene therapy have mostly______, but technique will surely be made to work eventually.

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问题 The first attempts at gene therapy have mostly______, but technique will surely be made to work eventually.
选项 A、stumbled
B、stammered
C、stridden
D、strutted
答案A
解析 题意：基因治疗的方案几乎失败了，但该技术最终肯定会有用的。stumble“蹒跚，摔跤”，可引申为“失败”，stammer“结巴”，stride“迈大步走”，strut“趾高气扬地走”，根据题意，A为正确答案。
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