Jack, ___monitor of our class 为什么不加the

Jack, ___monitor of our class 为什么不加the 为什么 the monitor of our class 的monitor 前可以加the? Bill sings best in our class为什么best不加 the jack is the tallest boy in our class 同义句 Jack is the ( y )boy in our class. Jack isn’t ___________ the best student in our class. Let us begin to have our class可以不加to吗?为什么 The girls ___ of our whole class. The number of ( )in our class( in our class,---of the students-- girls the number of the students in our class is fifty.为什么students we had our first glimpse of the snake.这里的our是什么用法,为什么加our