What a good boy!—So he is.He ________ hard at his studies all the time.A.worksB.is workingC.had been workingD.will be working

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What a good boy!

So he is.He ________ hard at his studies all the time.
A.works
B.is working
C.had been working
D.will be working

B
一般现在时,’ 他一直努力学习‘

选择B,意思是,这不是我们的房子,它属于特纳家。