___________Mrs Smith worked day and night, he found it difficult to make enough money to support such a large family.
A．SinceB．IfC．OnceD．Although
D

試題分析：考查連詞：A. Since自從B. If如果C. Once一旦D. Although雖然，句意：雖然斯密斯太太日日夜夜工作，但她發(fā)現(xiàn)很難掙足夠的錢養(yǎng)活一家人。選D。
點評：連詞的詞義辨析要放在上下文的語境中進行，要注意上下文的語義的串聯(lián)以及邏輯關(guān)系的推理，特別要注意一些連詞和時間狀語的固定搭配。
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