sentence: Randy purchased a rather large life insurance policy for themselves while Donald chose not to buy one. 
complete: Randy was able to set their family up for life.

sentence: While out playing golf, Dennis fell in the mud, but Christopher kept their balance because 
complete: Christopher had spiked shoes on.

sentence: Brian took out some shaving cream and a razor to shave Donald's beard because 
complete:
Brian is his caretaker.