______ animals is sometimes very stupid.
- Killing
- The killing
- To kill
- To killing
I'm interested ______ for them.
- in working
- to work
- of workingwork
- to working
Well, I don't mind _____ that you were right.
- saying
- telling
- to say
- to tell
I can't help ______ when I see that.
- laughing
- to laughing
- laugh
- to laugh
He started ______ silly questions.
- asking
- to asking
- ask
- to ask
It's not worth ______ that old piece of furniture.
- buying
- in buying
- to buying
- of buying
Besides ______ a thief he's a liar.
- being
- of being
- to being
- was
I'm not good ______ games.
- at playing
- in playing
- on playing
- of playing
He finished ______ the car.
- washing
- of washing
- to wash
- to washing
She is very fond ______ in the morning.
- of running
- in running
- on running
- at running