among,between
在···之間
between:兩者之間。
among：三者以上之中。
She is the student whose acting is the best among the girls in my class.
They must be hidden among the trees.
What's the different between Asian elephants and Afrian elephants?
注意：
如果句子中列舉三者或以上事物，又用了and時，一般用between不用among。
Laos lies between China,Burma,Thailand,Cambodia and Viet Nam.
各國之間友好關係，可以說成：
The friendly relations between the peoples.
表面上看，between似乎是用於兩者以上之間，但實際指每個國家和其他國家兩者之間的關係。
animal,beast
動物、獸
animal n. 是動物的總稱，它包括獸、鳥、蟲等，以區別植物、礦物。
The whale is the largest animal in the word.
beast n. 一般指較大的走獸，（不包括爬行動物），以區別鳥類和昆蟲。
Neither beast nor birds would regard the bat as a friend,so he was afraid to leave his home.
This beast is exactly like a wall.
注意：
animal和beast也可指人。這時指說話人對他人的不同態度。
Most o the masters thought of their slaves as animals that could be bought and sold.
answer, reply,return
回答
answer v.&n. 是最廣泛的詞，主要表示用筆頭或口頭回答別人提出的問題和要求。answer還可做“響應”。
We answer the Party's call.
reply v.&n. 用於較正式的文體中，表示較正式或經過考慮的全面答覆。
"Thank you,Mr.smith.But I can't work here any longer,"replied Johnny Ford.
The king replied that before he set him free he must be sure that Gulliver would do no harm to his people.
reply 用作不及物動詞時，後面連用to，表示回答旁人的問題（信件、祝賀、控訴、攻擊等）。
We replied to the enemy's fire.
return v.&n. 具有“答辯、反駁”的意思，主要用以引進直接引語。
"Nonsense!"he returned.
"Mind your own business!" I return.
