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16．I won't give you any help __ you tell me the truth．It's none of my business．（　　）

A．

unless

B．

since

C．

as if

D．

even if

分析即使你告訴我真相，我也不會給你任何幫助，這不是我的事．

解答答案D．
unless"除非，如果不"，在意義上相當于if…not，因此在有些場合中unless與if…not可互換使用，引導條件狀語從句．since意思是"自從…以來"時，引導時間狀語從句；意思是"既然"時，引導原因狀語從句．as if"仿佛，好像"，引導方式狀語從句．even if"盡管，即使"，引導讓步狀語從句．分析可知前后兩句話之間是邏輯上的"讓步"關系，再結合句子所表達的意思可知答案選D．

點評本題考查從屬連詞的用法．連詞的用法辨析，要注意分析主從句之間的邏輯關系，再確定相應的連詞，同時注意不同的連詞的語義及用法區別．

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