Помогите плиз с английским ...When some people meet ... they think

Помогите плиз с английским ...
When some people meet ... they think i am my twin brother,David. They do not know the difference. Our school friends know; they say i am more intelligent than .... In reality, it is easy for them because we study in different classes. When our mother looks at .... she always sees the difference. We can't play jokes on ....! When people visit our house they also know the difference.David always uses the computer and he plays on ... all the time. What do you think? look at the picture of .....Is the difference clear to ....
Вот такие слова необходимо воткнуть:Them, you, her , us , it, me,him,us.
Заблаговременно спасибо!!!