17.-Could you tell me why he was arrested? -He happened to on the train for Shanghai. A.be stepping B.be seen picking C.be caught to pull D.catch damaging 查看更多

 

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―Could you tell me why he was arrested?

―He happened to         on the train for Shanghai.

       A.be stepping          B.be seen picking    C.be caught to pull  D.catch damaging

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-Could you tell me why he was arrested?

-He happened to ________ on the train for Shanghai.

[  ]

A.be stepping

B.be seen picking

C.be caught to pull

D.catch damaging

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