He behaved _____ nothing had happened.
The store had no more red shoes _____, so Mary chose brown ones instead.
Don't go too far into the sea, children, or the waves will _____ you off your feet.
He was _____ by a bee when he was collecting the honey.
A landing on Mars is within the _____ of current physical theory.
You will get to the church more quickly if you take this _____ across the fields.