合并句子 Most people agree to the idea.Smoking is harmful to the health.（同位语从句）
问题描述：
合并句子 Most people agree to the idea.Smoking is harmful to the health.（同位语从句）
答
Most people agree to the idea 【that】 smoking is harmful to the health.
这里的 idea = 【that】 smoking is harmful to the health.
所以是同位语从句