问题
选择题
30.The problem lies in ______ the mist may become a thick fog , making the situation even worse.
A．that
B．which
C．what
D．that whether
答案
答案：A
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30.The problem lies in ______ the mist may become a thick fog , making the situation even worse.
A．that
B．which
C．what
D．that whether
答案：A