Li mei is the student ( ) handwriting is the best in our class A whoes B whom C who D that
选whose,凡是先行词与关系词后的名词是所有关系,不论人物都应该填whose 此句的先行词是student,后面是handwriting,学生与书法肯定是所有关系,"这个学生的书法"
I sat on the chair _____legs were broken .
He bought a house ____windows were very big .
这二句前后的二词都是所属关系的名词,所以都应该填whose .