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快來玩語法小鬼游戲，測試和提高你的英語語法水平。闖過三關，你將有機會獲得劍橋大學出版社出版的《實用語法》。
Get rid of the gremlins in your grammar? Play Grammar Gremlins. Test and improve your grammar, and help get your rocket back to earth.
Three levels to test yourself with, and you can find out which of the famous Cambridge University Press Grammar in Use books is right for you.
（來源：劍橋在線英語）
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