—Where did you get this book? —Oh I it in the bookshop when I was looking for another on

问题补充：

—Where did you get this book?

—Oh, I it in the bookshop when I was looking for another one.

A. came across

B. found out

C. looked for

D. came up

答案：

(答案→)A. came across

B. found out

C. looked for

D. came up

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