【題目】A scientist’s attempt to produce the world’s first gene-edited babies _____ are immune to HIV has sparked controversy in academia and the public.

A. as B. who

C. whom D. whose

【答案】B

【解析】

考查定語從句。句意為：一位科學家試圖培育出世界上首個對HIV有免疫力的基因編輯嬰兒，這在學術界和公眾中引發(fā)了爭議。定語從句的先行詞為babies，且從句缺少主語，故用關系代詞who引導從句。故選B。

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