2012考研必备:考研写作1500词(10)
bus - n. a public vehicle to carry peoplebusiness - 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")
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