問題詳情:
(2017·全國卷Ⅰ)This trend, ________ was started by the medical community (醫學界) as a method of fighting heart disease, has had some unintended side effects such as overweight and heart disease.
【回答】
which 先行詞為this trend,且非限制*定語從句中缺少主語,故用which引導該定語從句。
知識點:定語從句
題型:閲讀填空