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5、---Did you mend your bike this afternoon?

---Yes,I spent at least three hours_________ it.

A.finish doing    B.to finish doing    C finish to do    D.finishing doing

5、D

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---Did you mend your bike this afternoon?

---Yes,I spent at least three hours_________ it.

A.finish doing    B.to finish doing    C finish to do    D.finishing doing

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