写出下列动词的过去式。
(1) are _______ (2)begin _______ (3)break _______ (4)come _______
(5) drink _______ (6)fly _______ (7)give _______ (8)go _______
(9) leave _______ (10)run _______ (11)say _______ (12)see _______
(13) think _______(14)write _______(15) sit _______ (16)wear _______