--- ________ I remind you of is to return the book to our English teacher.   ---I will give it to him _________  I see him.   
#30925
A
That; immediately
B
What; directly
C
What; while
D
Whether; once
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In the final exam of last term, our maths teacher Mr.Wu gave us  ________we all couldn’t work out .
#33849
A
such a difficult problem that
B
so a difficult problem as
C
so difficult a problem that
D
as difficult a problem as