1704950297
They had journeyed to Russia on a mission．他们到俄国去执行一项任务。
1704950298
1704950299
引起许多短语作状语：
1704950300
1704950301
That’s very satisfactory on the whole．总的说来这很令人满意。
1704950302
1704950303
Don’t give it up on any account．不管有什么理由都不要放弃。
1704950304
1704950305
The school bus arrived at school on schedule．校车按时来到学校。
1704950306
1704950307
She looked at him now and then on the sly．她不时偷偷地瞧他。
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1704950309
She always acts on impulse．她总是冲动行事。
1704950310
1704950311
He accepted the cup on behalf of the team．他代表球队接受了奖杯。
1704950312
1704950313
引起各种短语作表语：
1704950314
1704950315
I’ve always been on my guard since then．从那时起我一直很警惕。
1704950316
1704950317
They were on the lookout for pickpockets．他们提防扒手。
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1704950319
She was on night duty．她值夜班。
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1704950321
At the moment I am on tour．现在我正在做巡回演讲。
1704950322
1704950323
Crimes are on the rise．犯罪率正在上升。
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1704950325
The workers are on strike．工人们正在罢工。
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1704950327
关于（某个题目），在（某个问题上）：
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1704950329
Write a term paper on Shakespeare．写一篇关于莎士比亚的学期论文。
1704950330
1704950331
I differ from you on that point．在这一点上我和你有不同看法。
1704950332
1704950333
He is absorbed in his work on bacteria．他凝神进行他关于细菌的工作。
1704950334
1704950335
She began to give him her views on the costumes．她开始给他讲她关于服装的看法。
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1704950337
靠……生活：
1704950338
1704950339
They lived mostly on vegetables from their garden．他们主要靠他们园子里的蔬菜生活。
1704950340
1704950341
He finds it difficult to live on his salary．他发现很难靠他的薪水生活。
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1704950343
The prisoners could not exist on bread and water．囚犯也不能单靠面包和水生活。
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1704950345
对于：
1704950346
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