I spend much money on books _____ I am not rich.
—I can’t always understand when people talk to me in English.—Why not __________English more after class?
— You must keep the door _______ when you leave your room. — But I want to get the fresh air. I think I can keep the window ________ instead.
—Look at the girl! Is it Susan? —No, it __________ be her. She has gone back to her hometown.
—What a nice watch!—My grandpa gave it to me as a gift on my __________ birthday.
—I haven’t seen such beautiful sights.—_____________.