---Are you taking morning exercise tomorrow?
---Sure. We do sports every morning_____ it rains
A．a(chǎn)s long asB．unlessC．a(chǎn)s thoughD．in case
B

試題分析：連詞辨析。A只要；B除非…；如果…不…;C似乎，好像；D以防；句意：明天你要去早鍛煉嗎？—當然。如果不下雨，我們是天天都要鍛煉的。根據(jù)句意說明B正確。
點評：連詞的詞義辨析要根據(jù)上下文的語境，要特別注意unless除非，如果…不…；在具體理解的時候，要把它換成if…not…來轉(zhuǎn)換，以便于理解，減少理解的障礙。
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