They use the same senses as we do and their feet and hands are similar toours,　　　chimpanzees still have opposable toes and can grasp things with their feet.

Do you know if he _______ to play basketball with us?–I think he’ll come if he __________ free tomorrow. [ ]

Spending time with family and friends is very important _____us.[ ]

It is snowing outside. Why not close the door to_________ the cold air?

What about ________ out for a walk?