1.We met him @by accident, quite @by chance.
2.Tell me what happened;don't keep me @in suspense.
3.@In general, far too many people get married @in haste.
4.The city was left @in ruins by the conquerors.
5.When a party gets @in full swing,everybody talks and has a good time.
6.@In a sense, your explanation is right, but there is a batter one.
7.@In view of the interest it has aroused,the exhibition will remain @On view @for one more week.
8.We were taken @by surprise when the inspector called.Yet we knew he was visiting everyone @in turn.
9@With much regret,we have to say,@in reply to your letter of the 18th,that we have o vaccines.
10.Dorothy's clothes are always @In good taste.
11.Rumours usually spread @by word of mouth.
12.Some suggestions that seem all right @in theory are not good @in practice.
13.He was a partner in the crime of forgery @to all intents and purposes.
14.That person is engaged @on probation.
15.When the young man heard that his friend was going to the city, he decided,@on the spur of the moment, to accompany him.
16.The man's honesty is @above suspicion.
17.A man @of honour will adhere to his convictions.
18.I was @under the impression that you had already made a couple of new outfits for yourself.
19.The chair is @in the way here,Let's move it away.
20.@The witness said @in evidence that he first met the accused at a pub.
21.@To the great admiration of all the on-lookers,the woman plunged into the river and rescued the man.
22.They arrived @in the late afternoon of 20th Decemer.
23.He'll telephone you @at lunchtime.
24.Do your children receive gifts @at Christmas?
25.He always writes @in a careless manner.
26.He returned to duty @on the expiry of his leave.
27.Much @to his regret, he had found out his mistake too late.
28.The tree was cut down @by degrees.
29.@At a given signal everybody raised a shout of hearty welcome to visitors.
30.@To all appearances he is seriously ill.
31.A man @of his character would not do anything mean.
32.He was resolved to do his duty @at hazards.
33. Health is @of is more value than money.
34.@To the best of my knowledge, he never went to Italy.
35.I consented yesterday, but @on second thoughts,I must refuse.
36.Call me by Friday @ata the latest.
37.@On her return form a shopping expediting, my aunt found that the burglar had taken all her money in the drawers.
38.The tea is not @to my liking.
39.@In his leisure hours, he reads science fiction stories.
40.Hte letter was sent to you @in error.
41.Passengers may leave bulky articles under the stairs @with the conductor's permission.
42.Jessie sang @to the accompaniment of the piano.
43.There was an accident @ at the crossroads @at midnight last night.
44.The adults worked @from 6 a.m. to 6 p.m.,@with an hour @ for lunch,Boys @under 18 were not supposed to start @till 8 a.m.
45.@By good fortune,Sue was able to find an excellent job.
46.It would not be @to my benefit to do that.
47.He acted both tragic and comic parts, but he was @at his best in comedy.
48.@For a change, let's have some Argentinean beef.
49.He saved the boy form the fire but @at the cost of this own life.
50.Nobody knows the age of the earth @for certain.