1．(2019·扬州一模) I am impressed with China's commitment to its climate goals, evidenced by the fact ________ China has met its 2020 targets three years ahead of schedule.
A．that B．which
C．what D．where
解析：选A 句意：中国对气候目标的承诺给我留下了深刻的印象，中国提前三年实现了2020年的目标。用that引导同位语从句，对前面的名词fact作进一步解释和说明。that不可省略。
2．(2019·镇江一模)Nicholas was very kind, merciful and generous.This is ________ Father Christmas is based on.
A．where B．how
C．what D．why
解析：选C 句意：尼古拉斯非常善良、仁慈和慷慨。这就是圣诞老人所依据的对象。be动词后面的表语从句中缺少宾语，所以用what引导。
