bus - n. a public vehicle to carry people
business - n. one's work; buying and selling to earn money; trade
busy - ad. doing something; very active
but - conj. however; other than; yet
buy - v. to get by paying something, usually money
by - conj. near; at; next to ("by the road"); from ("a play by William Shakespeare"); not later than ("by midnight")
发表于 2017-8-6 13:58:40