大学英语：Attempt v. 企图、试图

1)I didn't attempt the last question in the exam.(我没有试图去做试卷的最后一题。)

　　2)He attempted to keep his parents in the dark about what had happened.(他试图使父母对所发生的事一无所知。)

　　3)George had succeeded on his fourth attempt.(乔治要游过湖有困难，但他在第四次尝试时终获成功。)

　　4)He made no attempt to solve the problem.(他没有试图解决问题。)