His efforts to raise money for his program were ___ because no one showed any intention to take a cent out of his pocket.
It suddenly _____ to the detective that the professor was probably murdered by his own wife .
---What made her unhappy? ---_____.
The machine might break down someday in the future, ____, you can dial this number for help.
_________ returns first will win the big prize.
—Mary said Leo worked really hard. — _______.