open your books and r()

open your books and r() Open your books and turn to ___(page) 21. Now open your books, boys and girls.是什么意思? Now open your books and read the story as______as you can.　A Open your books and turn to ________ 20.打开书,翻到第20页 (填空题) please open your books and read lesson( ).A,fifth B,five C,t Open your books ( )read after me .A.but B.and C.so D.or Please open your books.改为否定句 Open your books and turn to page 20.为什么这里的book要加s?什么情况下要加s?动 Don't open your books .Please keep them_____(close) The teacher said to the students,“Open your books,please” Don't open your books.Please keep them c______