Exercise 280

Use in, on, at, by, until if necessary.

1. Students usually have their exams___the end of each term. 2. The book was rather simple. I read it___ a day. 3. He switched on the radio and TV___the same time. 4. It was difficult to persuade her but___the end she agreed to our proposal. 5. He is very punctual, his lectures always begin___time. 6. She nearly forgot about their meeting, but fortunately she remembered it___ time. 7- They will be working ___ 7 o'clock today. 8. Hurry up! I'm afraid,___the time we get to the station, the train will have already left. 9. Have you finished translating the book? — Not yet. I hope to finish it___ the end of the month. 10.___what time did he come? — He came late___the evening,___midnight, if I am not mistaken. 11. Boogie-woogie became popular in the United States.___the 1950s. 12. They came back___sunset, tired and hungry. 13. They went to the canteen ___ lunchtime. 14.___the past he used to be a skilled surgeon. 15.1 am sure, he will be well again___several days.

Exercise 281.

Fill in with for, since during, while,

1. I've known her___last October. 2.1 have been learning English___five years. 3. The film was boring and he went to sleep___the film. 4. He got acquainted with a very beautiful girl ___the holiday. 5. He got acquainted with a very beautiful girl ___he was on holiday. 6. She worked in a cafe___her holiday. She worked there___two months. 7. He has been playing the violin___eight years. 8.1 often read newspapers __. a meal. 9. It happened ___ they were asleep. 10. You'll have to be quiet___the performance. 11. Were there any telephone calls___I was out? 12. Where have you been? I have been waiting for you___ two hours,___ 12 o'clock! I've drunk three cups of coffee___that time. If I had had a book, I would have read it___I was waiting for you. 13. There are lots of people in the streets___the carnival. 14. She has been living in the country___the beginning of the summer. 15. He hurt his ankle___he ' Was playing basketball yesterday.

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