Zheng says that the most dangerous thing about a credit card is____ a person isn’t always aware of the fact____ he’s spending money.
--- I take the book out? ---I'm afraid not.
_______ that he was in great danger, Eric walked deeper into the forest.
_____twice, the postman refused to deliver our letters unless we chained our dog.
We are invited to a party______ in our club next Friday.
Tony was very unhappy for ______ to the party.