题目内容

He was in great trouble, but he acted _______ nothing had happened.
A．even ifB．as ifC．unlessD．until
B
连词辨析。A.即使  B.好似  C. 除非    D.直到。句意：他陷入了极大地麻烦，但是他表现得好像什么事都没有发生过。故选B。
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