I regret more time with my grandma before she passed away.A. not spendingB. not to spendC

问题补充：

I regret more time with my grandma before she passed away.

A. not spending

B. not to spend

C. not spend

D. not have spent

答案：

(答案→)A. not spending

B. not to spend

C. not spend

D. not have spent

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