--- ______ are their keys?--- I don’t know. Are they in the bag?
— My baby is sleeping. Would you like to the TV a little?— Sorry, I will do it right now.
— Excuse me, may I borrow your Chinese-English dictionary?— OK, here you are. But you can it for only two days.
Could you tell me ?
— I usually go to bed late at night. And you?— .
He found very difficult the math problem.