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题目内容
（华北水利水电大学混凝土结构设计原理）
They lost their way in the forest, and ______ made matters worse was that night began to fall. ( )(本题2.0分)
A、 that
B、 it
C、 what
D、 which
A、 that
B、 it
C、 what
D、 which
参考答案