【题目】There is some evidence, scientists report, ________ eating garlic may guard against cancer.
A.whichB.thatC.asD.who
在线课程【答案】B
【解析】
考查同位语从句的连接词。句意：科学家报告说，有一些证据表明吃大蒜可以预防癌症。分析句子成分可知，scientists report 是插入语，some evidence和eating garlic may guard against cancer是同位语，因此要用that连接，且that不充当成分，也不能省略。故选B项。