4．______ your teacher the problem with learning，theoretically，and they will help you．（　�。�
A．TellingB．To tellC．TellD．Having told

分析 告訴老師你的學(xué)習(xí)問題，從理論上講，他們會幫助你的．

解答 答案：C．
這里使用了固定句型：祈使句+and/or+簡單句．祈使句+and+簡單句相當(dāng)于if引導(dǎo)的肯定的條件句，如：Use your head and you will find a way．=If you use your head，you will find a way．祈使句+or+簡單句相當(dāng)于if引導(dǎo)的否定的條件句，如：Work hard or you won't pass the exam．=If you don't work hard，you won't pass the exam．所以選C．

點評 句型總結(jié)：
（1）祈使句（表條件）+or else/or/otherwise+主句（表結(jié)果）…"否則…，要不然…"
（2）祈使句（表條件）+and+主句（表結(jié)果）
例：Please call me up before you come，otherwise/or else/or we might be out．你來之前打個電話，否則，我們也許會出去．
   Work hard and you will make progress every day．好好學(xué)習(xí)，天天向上．

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