题目

The teacher asked more _____ to prevent the students’ eyes from being injured. A. to do             B. done         C. to be done          D. being done 答案：C 解析: 由ask sb. to do sth.可知此处应用不定式。宾语与宾语补足语之间为被动关系，故用to be done。已知图1是函数y=f（x）的图象，则图2中的图象对应的函数可能是（ ）A．y=f（|x|）B．y=|f（x）|C．y=f（-|x|）D．y=-f（-|x|）