I smell something __________ in the kitchen. Can I call you back in a minute?
I can’t buy ________that one.
The troops _______ themselves to go into battle.
But for friction (摩擦力), people ______ neither walk, nor even stand up.
It was after he got what he had desired_____ he realized it was not so important.
He was allowed to go swimming _______ he kept near the other boys.