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前后举了不少有关at和in引导的介词短语。欲罢不能，现在举些由on引导的，使大家的介词短语更丰富起来。 （1） On the air：在广播中 The Prime Ministers National Day speech was broadcast live and will be on the air again. （2） On balance：权衡轻重之后 Our national football feam sometimes won but sometimes lost. On balance, it has had a quite good track record. （3） On the dole：接受福利金 In the West, unemployed workers can still survive if they are on the dole. （4） On an even keel：平稳的 The grocery business has experienced a tough period, but it is back on an even keel. （5） On the loose：不受拘束的 According to some newspaper reports, a big tiger is on the loose in an outlying island. （6） On the make：热衷于追求名利 Among your friends, do you have some continually on the make? （7） On the mend：病情在好转件 When I saw Mike last time, he was quite ill, but he is now said to be on the mend. （8） On the move ：在活动中 A good friend of mine has been on the move in and out of the country, trying to find business to do. | 
