【题目】They have leading experts in this field, and that’s ______ they’ve made important progress.
A．where B．why C．whether D．who
在线课程【答案】B
【解析】本题考查表语从句。表语从句的成分完整，所以排除D项who这个连接代词，根据句意，题干缺少“为什么”的意思，所以选择B项why。句意：在这个领域他们有领先的专家，那就是为什么他们取得了重要的进展。
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They have leading experts in this field, and that’s they’ve made important progress.A．where B．why C．
编辑：chaxungu时间：2026-04-27 03:01:36分类：高中英语题库
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