I didn't mind____ all my spare time ____ the sick old man.

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I didn't mind____ all my spare time ____ the sick old man.
I didn't mind____ all my spare time ____ the sick old man.

I didn't mind____ all my spare time ____ the sick old man.
一空 一词吗?
spending in
可能是······但我感觉更好应该是spending (in)looking after