________to attract young readers, the book is full of interesting stories and features simple language.
—Has William finished writing his graduation paper yet? —I don’t know exactly,but he __________all day.
—Would you like to tell me what our teacher said just now? —She said that light__________faster than sound.
—Did you telephone the manager’s office? —Yes,he__________back before 9 o’clock this morning.
You can certainly leave the classroom as soon as your homework__________.
—Do you smoke? —No,I don’t.It’s two years since I __________.