22.If we know more about _______causes t
问题:
22.If we know more about _______causes the problem, we may take measures before it is _______late.
A.what; too
B.which; very
C.that; already
D.that; so
22.If we know more about _______causes the problem, we may take measures before it is _______late.
A.what; too
B.which; very
C.that; already
D.that; so