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Tom's aunt wants to know he has been up to so far; therefore, she decided to sen

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Tom's aunt wants to know he has been up to so far; therefore, she decided to sen

Tom's aunt wants to know ________ he has been up to so far; therefore, she  

   decided to send him an e-mail.

   A. which      B. why           C. what          D. how

试题答案

C