On hearing a great noise, Mike looked forward through the window _____ what happened outside the room.
Understanding the cultural habits of another nation,especially ______containing as many different subcultures as the United States,is a complex task.
—Have you got ______ready for the dinner? —No,I still need to buy some pork and vegetables.
—Where can I tie the horse? —Oh,you can tie it to ______of the tree.
Many______ scientist wants to be ______second Newton.
It’s______ great pleasure for him to be invited to the party.