Ⅰ.单句语法填空
1．(2019·全国卷Ⅰ)While they are rare north of 88°，there is evidence that they range all the way across the Arctic，and as far south as James Bay in Canada.
解析：考查同位语从句的连接词。分析句子可知，同位语从句结构意义完整，解释说明evidence的内容，只缺少连接词，故填that。
2．(2019·北京卷)What students do at college seems to matter much more than where they go.
解析：考查连接词。句中go是不及物动词，接副词作状语，表示“他们未来走向何方”，故填where。
3．(2018·全国卷Ⅲ)I'm not sure who is more frightened，me or the female gorilla (大猩猩) that suddenly appears out of nowhere.
解析：考查宾语从句引导词。分析句子成分，空格处作从句的主语，联系下文中me or the female gorilla可知此处作者把自己和大猩猩作对比，“我不知道我和大猩猩谁更害怕”，故填who。
4．(全国卷Ⅱ)As natural architects，the Pueblo Indians figured out exactly how thick the adobe walls needed to be to make the cycle work on most days.
解析：分析句子结构可知，空格处是一个宾语从句。空格后的thick为形容词，因此空格处应用副词，故填how。
5．(广东卷)I didn't understand why this would happen and my credit card had already been charged for the reservation.
解析：根据语境可知，“我”不知道/不明白为什么会发生这样的事情。不明白的一定是原因，故用why引导。
