It was the coldest winter, and many animals died __________ the cold.
I ________ think smoking _______ good for you.
Do you come to school by yourself ______ with a friend?
His father looks _________ and he is looking ________ at his son.
--- I didn’t see you at the party yesterday. Why? --- Because I ________ for an important person from America at that time.
I hope you __________ in this city for a few more days.