—Wow! It snowed last night. What a nice world!—You're right. But it's more difficult to find my missing keys with snow________ the ground.
--- Where did you get to know him? --- I think it was in the factory______ I worked ten years ago.
Many of his classmates came to his birthday party; it was a great success to him.
—Hi , Tom , why are you looking so tired ? —I'm tried. Because I ______ the living room all day.
______ is troubling me is ______ I don’t understand ______ he said.
My parents offered me some money, ________, I couldn’t have bought that house.