After a long walk, the old man be tired now.
—Do you often get online? — Yes. I ______ lots of time on it. It’s a good way to kill time.
—Would you like to go to the concert with me tonight? —I’m sorry I can’t. Mother won’t ________me to go out in the evening.
—What do you think of the dish? —It is sweet and sour, but isn’t __________.
— I’ll return the book to Mary, but I can’t find her anywhere. —She ______ the teacher’s office. You can find her there.
—When did your daughter go to sleep last night? —She didn’t go to bed ______ she finished her homework.