The disappearance of dinosaurs is not necessarily caused by astronomical incidents .But _________explanationsare hard t

当前位置：高中英语 / 单选题

1. (2017·江苏) The disappearance of dinosaurs is not necessarily caused by astronomical incidents .But _________explanations
are hard to find .

A . alternative B . aggressive C . ambiguous D . apparent

微信扫码预览、分享更方便

使用过本题的试卷