5．Take the note as a reminder _____we might forget to buy what we need while shopping．（　　）
A．unlessB．in caseC．even ifD．once

分析 帶著這張便條作為提醒，以防你在那兒購物時忘記買我們需要的東西．

解答 答案B．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．in case"以防萬一"，引導條件狀語從句；even if"縱然，即使"，引導讓步狀語從句；once"一旦"，引導時間狀語從句．根據(jù)句子所表達的意思可知，前后兩句話應該是邏輯上的條件關(guān)系，可排除C和D兩項．再根據(jù)下文語境"we might forget to buy what we need while shopping"和句子所表達的意思可排除A，故答案B項正確．

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關(guān)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(qū)別．

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