______ regular exercise is very important, it is never a good idea to exercise too close to bedtime..
A．IfB．AsC．UnlessD．Although
D

試題分析：考察連詞辨析。A如果；B隨著；C除非，如果…不；D即使，盡管；句意：盡管經(jīng)常鍛煉很重要，但是鍛煉到睡覺的時候卻不是一個好主意。根據(jù)句意說明上下文是轉(zhuǎn)折關(guān)系，故D正確。
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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