As a teacher, I seldom give my students so difficult a problem they can not work out.A. t

发布时间：2020-08-16 09:00:58


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

网友回答

A. that
B. if
C. in order that
(答案→)D. as
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