To keep the air fresh during the night, I often sleep with the windows on ________ it’s really cold.
There were noises coming from upstairs, but we didn’t them.
— Would you like a cup of coffee or a bottle of juice? — . I’d like some milk.
— It’s dangerous to walk across the street carelessly. — You’re right. We can’t be careful while crossing the street.
My son is a (an) boy and he always asks me all kinds of strange questions.
I miss my parents very much. I’m seeing them again.21·cn·jy·com