—I have never been to the Great wall. —If you have an opportunity _______ there, you must take it.
Zhang Lili, _________ good teacher, is regarded as _________ most beautiful teacher at present.
He ______finish his homework before 12 o’clock.
You can choose _____book you like in the library.
He went to the garden and saw ________ one-year-old baby on the grass.
You can’t get back your football_________you finish your work.