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---Mum, I failed the test again. --- Oh, I knew it. How can you learn anything y

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---Mum, I failed the test again. --- Oh, I knew it. How can you learn anything y

 ---Mum, I failed the test again.

  --- Oh, I knew it. How can you learn anything ____ you spend all your free time watching television.

A. while              B. as      C. when            D. unless  

试题答案

C