用显微镜可以观察动、植物细胞的基本结构．下列有关叙述中正确的是（　　）

    Hello, my name is He Lin. I'm in Class2, Grade 7. There are forty-three students in my class, nineteen girls and ____ （二十四）boys. There is a ____ （电脑）on the teacher's desk and a TV in the____ （前面）of the classroom. Are there any photos on the classroom walls? Yes, there are. But there ____ （没有）a map of China or a map of the world on the wall. What about your class? How ____（多少）students are there in your class?

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