问题
选择题
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
答案
答案：A
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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
答案：A