题目

The ball is _________ my desk. ( )A.up B.to C.on 答案：【答案】C【解析】句意：球是_____我的书桌。up向上，to到，on在……上边。根据my desk可知，此处应是on my desk在我的书桌上。故选C。  In a spors team each player has a clear role，and there are few______when members are uncertain of their roles.    A. occasions          B. positions          C. chances      D. situations