Lesson Three is __ most difftcult lesson, but it isn't __ most difficult lesson in Book Two.

问题描述:

Lesson Three is __ most difftcult lesson, but it isn't __ most difficult lesson in Book Two.
A.a;aB.a;the C. the;the D.the;a

b 第一个MOST 其实跟VERY 一样 第二个是*