6．Don't put off till tomorrow _______ you should do today!（　　）
A．whatB．whenC．thatD．which

分析 不要把今天應該做的事情推到明天．

解答 答案：A
題干中you should do today是作put off的賓語，是一個賓語從句；賓語從句中do缺少賓語，要用連接代詞；which在賓語從句中表示有范圍的選擇，句意表達的是不具體的事情，不是表示選擇．故選A．

點評 從屬連詞是連詞的一種，用來引導名詞性從句和狀語從句．大致可分為三大類：that（無詞義，不做成分）if，whether （表達是否的意義，但不做句子成分）； 連接代詞：who，whom，whose，what，which，whatever，whoever，whichever（有詞義，在句子中可作主語、表語、賓語）；連接副詞：when，where，why，how，how many，how long，how far，however，whenever，wherever （有詞義，作從句的狀語）．學習時，要注意區(qū)分和掌握．

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