13.-Can you sing this song in English? -Of course I can. It often by us children. A.was-sung B.is-sung C.is-singing D.is-sang 查看更多

 

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— Can you sing this song in English?
— Of course I can. It ______ often ______ by us kids. 
A.is; singingB.does; singC.has; sung D.is; sung

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