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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