问题补充:
--What do you think of maths?
--My favorite. It’s for me to study of all the subjects in school.
A. more difficult
B. the most difficult
C. less difficult
D. the least difficult
答案:
A. more difficult
B. the most difficult
C. less difficult
(答案→)D. the least difficult
解析:由the+最高级+of+可数名词复数
可排除AC
由原句My favorite.
可排除B
故选D