—Darlin, shall we change our mattress(床垫) for a better one, the price of which is a twice more, OK?—All right. I get a headache when it comes to figures.
_______ for the coming examinations before, I have no time for the film.
The books _______ belong to Mr. Smith.
How little Franz regretted the days ______ playing in the woods and fields.
They _____ be at home. You see, the door is locked from the outside.
______ you return those books to the library immediately, you will have to pay a fine.