通读下面短文，掌握其大意，然后从所给的A、B、C、D四个选项中选出一个可以填入短文空白处的最佳选项。   

    Look, this is 1 bedroom. It is a 2 nice room. A clock 3 some pictures are 4 the wall. 5 is on the desk. His schoolbag is 6 the chair. His coat is on the bed. Where is 7 baseball? It's 8 the door. What's that? 9 a cat! It 10 Mimi.