acen.1.(纸牌等中的)幺点，“A”牌；2.(网球等比赛中)发球得分；3.(在某方面的)佼佼者；adj. 第一流的，杰出的

A:Do you play the acoustic guitar?

B:Usually I play the electric.

acoustic a.1.听觉的，声音的;2.(乐器)原声的

A:Have you acquainted yourself with the material yet?

B:No, I still have to read the book.

acquaint vt.(with)使认识，使了解，使熟悉

A:Has the case come to a close?

B:Yes, the suspect was acquitted because there was not enough evidence.

acquitvt.1.宣判……无罪；2.(oneself)使(自己)作出某种表现

A:If you press that red button you will activate the bomb.

B:I’ll be sure not to press it then.

activatevt.使活动起来，使开始起作用

A:What do you want to be when you grow up?

B:A feminist activist , working for female rights

activistn.(政治活动的)积极分子，活动家

A:Do you drink tea?

B:Yes, but I am addicted to coffee.

addictn.1.有瘾的人;2.入迷的人；vt. 使成瘾，使入迷

A:I watch too much television.

B:Me too, it is addictive

addictiveadj.使人入迷的，使人上瘾的

A:Are you going to wear those old shoes to the wedding?

B:Yeah, I hate adhering to formalities.

adherevi.(to )1.黏附，附着;2.遵守，坚持;3.追随，支持

A:Your poster has fallen down from the wall.

B:I ran out of adhesive and forgot buy some more.