Question

【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

Answer 1

【答案】B

【解析】

考查定語從句。句意為：一位科學(xué)家試圖培育出世界上首個(gè)對(duì)HIV有免疫力的基因編輯嬰兒，這在學(xué)術(shù)界和公眾中引發(fā)了爭(zhēng)議。定語從句的先行詞為babies，且從句缺少主語，故用關(guān)系代詞who引導(dǎo)從句。故選B。