A political advisor suggested giving out red pockets to the whole nation directly to encourage economics，_____I believe is of great valueA.thatB./C.whichD.why
网友回答
C解析在考查定语从句时会利用插入语或状语的添加来增加试题的难度。常见的插入语有：I think （suppose, expect, believe, imagine）, in my opinion, to tell you the truth等。做这类题目时我们可以先删去插入语或状语，找出句子的主干。在该句中先行词是discovery，which是在引导非限制性定语从句，在句子里做主语。