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 Students should be encouraged to finish their homework ____. 

A.of themselves           B. of their own            C. for their own           D. on their own

Students should be encouraged to finish their homework ________.

　　A．of themselves

　　B．of their own

　　C．for their own

　　D．on their own

　　A．of themselves

　　B．of their own

　　C．for their own

　　D．on their own

Students should be encouraged to finish their homework ________.

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