When he picked up a large sum of money by accident, he battled with his _____ whether he should keep it or return it to the owner.
I went ______a balloon but I didn’t see anyone _____ balloons.
This soup is cold; it needs _____.
She sat at the desk and set about _____ a letter to her friend.
Although swimming is his favourite sport, yet he doesn't like _____ today.
No one was surprised at _____ the examination.