advise [to help with information, knowledge or ideas in making a decision] Did you advise him to leave?
affect [(1)to influence；(2)to produce an effect on] A lack of sleep affected the singer's performance. (1) Mr. Nutley's belief in my talent greatly affected my life. (2)
afraid [feeling fear] I am afraid of guns.
after [(1)later; (2)behind] She arrived after the lesson started. (1) In the alphabet, B is after A. (2)
again [(1) another time; (2) as before] Sam played the song again. (1) I found my book in the same place again. (2)
against [(1) opposed to; (2) not agreeing with something] They marched against the war. (1) He agreed to most of the plan, but was against starting it now. (2)
age [how old a person or thing is] The legal age for voting is eighteen.
agency [an organization that is part of a larger group] UNICEF is an agency of the United Nations.
aggression [(1) an attack against a person or country; (2) the violation of a country's borders] The surprise attack was an act of aggression. (1) The country committed aggression when it crossed the border of the other country. (2)
ago [(1) of time past; (2) before now] He was my friend long ago. (1) I saw her two years ago. (2)
agree [(1) to have the same belief as someone; (2) to be willing to do something] We agree about politics. (1) Both sides agree to meet again next week. (2)
agriculture [farming] John studied agriculture because he wanted to be a farmer.
aid [(1) to help; (2) to support; (3) help, assistance] He offered to aid the victims of the fire. (1) Did you give money to aid the Democratic or the Republican candidate? (2) Congress voted to provide aid to the flood victims. (3)
aim [(1) to point a gun at; (2) a goal or purpose] You cannot hit the target if you do not aim the gun. (1) The aim of the reformers is to improve government. (2)
air [the mixture of gases around the earth, mostly nitrogen and oxygen, that we breathe] The air is clean in the mountains.
