1.They are orange trees . (改为单数句)
_________ _______ orange tree.
2. There are sixteen boys and fourteen girls in my class. (同义句)
   We        _________ students in my class.
3.There are some reading rooms in our school. (划线部分提问)
                       in your school?
4.Please feed the animals.(改为否定句)
  Please ________ ________ the animals.
5.The students are on the play ground.(对画线部分提问)
      ________ ________ the students?