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a workerï¼ä¸ä¸ªå·¥äººï¼ a bookï¼ä¸æ¬ä¹¦ï¼
an oil workerï¼ä¸ä¸ªç³æ²¹å·¥äººï¼ an interesting bookï¼ä¸æ¬æ趣ç书ï¼
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a universityï¼ä¸æ大å¦ï¼ an umbrellaï¼ä¸æä¼ï¼
a Europeanï¼ä¸ä¸ªæ¬§æ´²äººï¼ an errorï¼ä¸ä¸ªé误ï¼
a horseï¼ä¸å¹é©¬ï¼ an hourï¼ä¸ä¸ªå°æ¶ï¼
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1) 表示âä¸ä¸ªâ人æäºç©ãä¾å¦ï¼
a childï¼ä¸ä¸ªå°å©ï¼ a gardenï¼ä¸ä¸ªè±åï¼
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I want to buy one copy, not two. æè¦ä¹°ä¸æ¬ï¼ä¸æ¯ä¸¤æ¬ã
2) 表示âä¸ç±»â人æäºç©ãä¾å¦ï¼
A teacher is one who teaches in school. æå¸æ¯å¨å¦æ ¡æ书ç人ã
A tractor is more useful than a horse. æææºæ¯é©¬æ´æç¨ã
3) æäºåºå®æé
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after a fashionï¼é©¬é©¬èèï¼ come to an endï¼ç»æï¼
all of a suddenï¼çªç¶ï¼ as a ruleï¼é常ï¼
as a result ï¼å æ¤ï¼ as a wholeï¼âè¬å°è¯´ï¼
at a lossï¼ä¸ç¥ææªï¼ be in a hurryï¼å¿å°ï¼
in a wayï¼æäºï¼ in a wordï¼æ»ä¹ï¼
Itâs a pity thatï¼çå¯æï¼ put an end toï¼ç»æï¼
with a view toï¼ä¸ºäºï¼ with a willï¼å³å¿)
take an interest inï¼æå
´è¶£ï¼ have a good timeï¼ç©å¾çå¿«ï¼
have a word withï¼ä¸â¦è°è¯ï¼ have a coldï¼æ£æåï¼
have a restï¼ä¼æ¯ä¸ä¼ï¼ keep an eye onï¼æ³¨æçï¼
lend a handï¼å¸®å¿ï¼ make a livingï¼è°çï¼
make a fireï¼çç«ï¼ make a fool ofï¼æå¼â¦ï¼
make a fortuneï¼åè´¢) make a study ofï¼ç 究)
take a walkï¼æ£æ¥ï¼ once in a while ï¼å¶å°ï¼