精选优质文档-倾情为你奉上 名词性从句复习练.单句语法填空1Exactly _ the potato was introduced into Europe is uncertain, but it was probably around 1565答案：when句意：土豆被引入欧洲的确切时间不能确定，但很可能是1565年左右。分析句子结构可知，设空处为主语从句的引导词，从around 1565判断，这里指时间，故填when。2It shocked the world _ the United States withdrew from some major agreements it had been committed to, including the 2015 Paris Agreement on climate change and the 2015 Iran Nuclear Deal答案：that句意：令世界震惊的是，美国退出了它所承诺的一些主要协议，包括2015年巴黎气候变化协定和
