18.accuse vt.指控，指责 accuse sb of (doing ) sth 控告…

　　19.accustomed adj.习惯的，适应的，惯常的

　　be/ get/ become accustomed to doingHe was soon accustomed to getting up early.

　　20.ache vi./n headache / toothacheMy back aches so much.

　　21.achieve vt 达到;取得 achievement n 成就

　　achieve success/victory/one’s goal;

　　22.achievementn.成就，业绩;完成(任务等) make great achievements

　　23.acknowledge v.承认，致谢

　　It is generally acknowledged that global warming is caused by greenhouse gases.

　　Yaoming is acknowledged as/ to be the best player in China.

　　I acknowledged financial support from the local government.

　　24.across prep cross v.I walked across the street.; cross a street;come/run across碰到

　　25.act n.法令，条例vt.表演，扮演，行动，做事

　　act as 充当;扮演 act out 把…表演出来

　　26.action n.行动take action to do sthput sth into action 把…付诸实施

　　27.active adj.积极的;主动的 take an active part in /be active in 积极参加

　　28.activity n.活动 outdoor activities 户外运动

　　29.actual a.实际的actuallyadv. in (actual) fact 实际上

　　30.adapt vi.适应，适合，改编vt.使适应adapt to change /the city life

　　adapt oneself to the new surroundings adapt the novel for a film adaptation n.适应

　　31.add vt 添加，增加，补充说(that)

　　add(…)to 添加add up 把…加在一起 add up to总计为; 总数为

　　a) His illness added to our trouble.b) He added that he would come again.

　　c) Please add these figures up.d) These numbers add up to 100.

　　e) He added some salt to the water.

　　32.addressn.地址 vt.写地址;向…讲话(尤指演讲)

　　address the letter to sb.给某人寄信 The letter was wrongly addressed.

　　The president addressed the public.

　　33.adjust vt.调整，调节，适应adjust your speed /the volume/ the camera

　　adjust to the dark/ the single life adjust yourself to the student life adjustment n.调整，调节

　　34.admire v 钦佩.;羡慕

　　admire sb for sth I admire John for his courage.