Only when the painting decide whether the painting is worth buying.A. he sees, he canB.

Only when the painting decide whether the painting is worth buying.
A. he sees, he can
B. does he see, can he　　
C. he sees, can he
D. sees he, he can

A. he sees, he canB. does he see, can he　　(答案→)C. he sees, can heD. sees he, he can解析： only引导的状语在句首，主句要部分倒装。

哦，回答的不错