As a teacher, I seldom give my students
题型:选择题
问题:
As a teacher, I seldom give my students so difficult a problem ________ they can not work out.
A.that
B.if
C.in order that
D.as
As a teacher, I seldom give my students so difficult a problem ________ they can not work out.
A.that
B.if
C.in order that
D.as