There is a clock______top of the building.（填介词）快,很简单的题目啦~~~~~~~~

This is Tom's classroom.There are 30____.There is a clock____. 完成英文句子,每空一词1、I often play basketball with michael ____ ____ ____ ____2、we held a class meeting ____ three o'clock____ five o'clock yesterday aftenoon3、there is a garden ____ ___ ____ ____ our yard4、everone ___ ____ ____ __ Is there a window? There is a middle there is a cat there is a problem Is there a school Is there a house___? There is a Is there a. there is a There is a kitshen. There is a pair over is village a there there (.) There is a long r______ there. There( )(be)a football match,is there. there is a baby horse over there. there ,a there,is ,phone如何排列?