For years he struggled______as teacher, an agent and the president.

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问题 For years he struggled______as teacher, an agent and the president.

选项 A、by turn
B、on the turn
C、out of turn
D、in turn

答案D

解析 该题是词汇题,考查与名词turn有关的短语辨析。与介词by搭配的短语应该是by turns,表示“轮流、交替”,如:The book is,by turns,funny and very sad.这部书时而妙趣横生,时而悲悲戚戚。短语on the turn表示“在转变中、在变质”,如:The tide is on the turn.快涨潮了。/This ice cream is on the turn.冰激凌在变质。短语out of turn表示“在不该做某事时、不合时宜”,如:Excuse me if I’m talking out of turn.but I feel I must tell you the effect your behavior is having on your mother.如果认为我讲得不当请原谅,但我觉得我必须告诉你你的行为所带给你母亲的影响。短语in turn表示“轮流、一个接一个地”,如:The boys were sum moned in turn to see the examiner.男孩子们被一一叫去见主考官。因此,根据题意,选项D为最佳答案。
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