453. keep on doing sth. 继续做某事
454. keep off 避开；不接近
455. keep up with 跟上；不落后；
456. keep a secret 保守秘密
457. keep away from 远离
458. keep in touch . 保持联络
459. keep in mind 紧记
460. a key to sth. 解答；答案
461. a key for sth. … 的钥匙
462. a key of sth. …的键
463. a kind of 一种, 一类
464. all kinds of 各种各样的
465. kind of 有点儿，有几分
466. knock at 敲 (门, 窗)
467. knock into sb. 撞在某人身上
468. know about sth. 了解
469. be known for sth. 以…而闻名
470. lack of 缺乏
471. at large 逍遥法外的
472. at last 最后, 终于
473. be late for (school) 迟到
474. laugh at 嘲笑, 漠视
475. lay out 布置；安排, 陈列
476. lead to 导致; 通向
477. league member 团员
478. learn of/about 得知；获悉
479. learn one's lesson接受教训
480. learn by heart . 记住
481. learn from sb. 向…学习
482. learn to do sth. 学习(技能)
483. at least 至少
484. leave about(around) 乱扔,乱放
485. leave behind 留下, 遗留, 超过
486. leave for 到.去, 出发前往
487. leave over 留下
488. on the left 在左边
489. lend sth to sb. 把..借给..
490. less than 少于, 不到
491. do one’s lessons 做功课
492. have lessons 上课
493. teach sb. a lesson 给…教训
494. let in 让…进来
495. let out 放出, 发出; 泄露
496. level of living 生活水平
497. lie on取决于, 依赖, 压迫
498. live a happy life 过着幸福生活
499. full of life 充满活力
500. life story传记
501. give sb. a lift 让…搭便车
502. light up点火，点燃
503. be like 像
504. feel like想要
505. look like似乎，好像
506. line up排成行，排成列
507. listen to 听…(讲话)
508. a little 一点儿;少量
509. little by little 渐渐
510. live on 靠…生活
511. make a living 谋生
512. high standards of living
高水准的生活
513. living-room 起居室
514. before long 不久以后, 很快
515. long ago 很久以前
516. long before 很久以前
517. no longer 不再
518. not …any longer 不再
519. long for sth. 渴望
520. look after 照料
521. look at 看；观看
522. look for 寻找
523. look out 当心, 小心
524. look up (在字典\参考书中)查寻
525. have a look 看一看
526. take a look 看一看
527. look forward to 盼望
528. a lot of =lots of 许多，大量
529. have lunch 吃午饭
530. be mad with joy 欣喜若狂
531. be mad about sth. 对…痴迷
532. major in 主修; 专业
533. major idea主旨
