题目

This is the best way ______ him ______ too much TV.A. stopping; watching B. to stop; to watchC. to stop; watching D. stop; to watch 答案：【答案】C【解析】句意：这是阻止他看太多电视的最好方法。考查动词形式辨析。stop to do停下来做某事（还没做），stop doing停止做某事（在做的事），stop sb. doing阻止某人做某事。本句用不定式做the way的后置定语，根据句意语境，可知是阻止他看太多电视的最好方法，故选C。（-5a2+4b2）（　　）=25a4-16b4，括号内应填（　　）A．5a2+4b2B．5a2-4b2C．-5a2-4b2D．-5a2+4b2