Điền động từ "tobe" (is;are;am)vào chỗ trống trong các câu sau: 1) Her name ............Mai. She .............a student in Nguyen Dinh Chieu secondary school. 2) There .............many student in my school. 3) We ..............fine,thanks. 4) How old ...............you ? I ............eleven years old. 5) ............you Peter ? 6) My teeth ............ white.