C) Complete the following sentences: 1. After I had watched that horror film, I …………………………………………………… 2. She finished her homework after …………………………………………………………. 3. When I came home, my sister ……………… already …………………………………… 4. Before he went out, ………………………………………………………………………. 5. They had telephoned me before ………………………………………………………….. D) Read the passage and answer the questions: I had an amusing experience last year. After I had left a small village in the south of France, I drove on to the next town. On the way a young man waved to me. I stopped and he asked me for a lift. After he had got into the car, I said good morning to him in French and he replied in the same language. Except a few words, I do not know any French at all. Neither of us spoke during the journey. I had nearly reached the town, when the young man suddenly said, very slowly, “Do you speak English?” As I soon learned, he was English himself! 1. When did the writer drive on to the next town? ……………………………………………………………………………….. 2. When did he say good morning to the man in French? ……………………………………………………………………………….. 3. When did the young man say, “Do you speak English?” ……………………………………………………………………………….. E) Fill in the following sentences by using PAST PERFECT CONTINUOUS TENSE: 1. We ………………………………………………… (play) football for half an hour when it started to rain. 2. I …………………………………………………. (study) English for a short time when the electricity went off. 3. She ……………………………………………… (do) her homework before you came in. 4. His knees and hands were very dirty. He ………………………………………….. (crawl) in the garden. 5. I ……………………………………………… (drive) the car for five years when I sold it. 6. We were very tired. We ………………………………………………. (travel) for about sixteen hours. 7. They were out of breath. They ……………………………………………… (run) for a long time. 8. He ……………………………………………. (live) in London for ten years when he had an accident. 9. He was tired because he ……………………………………………….. (write) letters all morning. 10. He …………………………………………….. (repair) the radio for an hour when you arrived. F) Fill in the following sentences by using PAST PERFECT CONTINUOUS TENSE: 1. I was tired because I …………………………………………. (type) for a long time. 2. Her boss was very angry with her because she …………………………………………. (come) to work very late. 3. I didn’t know about the earthquake because I ……………………………………… (not / watch) television. 4. She was too fat because she …………………………………………….. (not / keep) her doctor’s advice. 5. I took my car to the garage because the brakes ……………………………………………. (not / work 6. She had to go to the dentist because she ………………………………………. (not / clean) her teeth. 7. He got bad marks because he …………………………………………… (not / study) hard. 8. She wasn’t at home. She ……………………………………………. (go) out with her boyfriend. 9. I thought I …………………………………………………… (behave) like an ididot. 10. He ……………………………………………….. (study) English) very hard for the last

незнаю так не ток но всеже

Объяснение:

) интервьюер с Хизер то, что она будет помнить о своей школе.

2) интервьюер с Хизер, если бы ей нравились ее школьные годы.

3) интервьюер с Хизер, каково было ее представление о великом учителе.

4) интервьюер с Хизер, если бы наука не была ее любимым предметом.

5) интервьюер с Хизер, если бы она изучала испанский или французский.

6) интервьюер с Хизер, если бы у нее всегда был хороший табель успеваемости.

7) интервьюер с Хизер, какая музыка напомнила бы ей о ее школьных днях.

8) интервьюер с Хизер, сдала ли она все экзамены или нет.

9) интервьюер с Хизер, если бы она собиралась в университет или если бы она взяла перерыв год.

is sheet metal forming

and where it can be used? 3. What is close-die forging? 4. What is forging? 5. What are the types of forging? 6. What types of hammers are used now? 7. Where are coining and upsetting used? 8. What process is used in wire production? 9. Describe the process of making the roof of a Drawing consists of pulling metal through a die. One type is wire drawing. The diameter reduction that can be achieved in one die is limited, but several dies in series can be used to get the desired reduction. Sheet metal forming Sheet metal forming is widely used when parts of certain shape and size are needed. It includes forging, bending and shearing. One characteristic of sheet metal forming is that the thickness of the sheet changes little in processing. The metal is stretched just beyond its yield point (2 to 4 percent strain) in order to retain the new shape. Bending can be done by pressing between two dies. Shearing is a cutting operation similar to that used for cloth. Each of these processes may be used alone, but often all three are used on one part. For example, to make the roof of an automobile from a flat sheet, the edges are gripped and the piece pulled in tension over a lower die. Next an upper die is pressed over the top, finishing the forming operation, and finally the edges are sheared off to give the final dimensions. Forging Forging is the shaping of a piece of metal by pushing with open or closed dies. It is usually done hot in order to reduce the required force and increase the metal's plasticity. Open-die forging is usually done by hammering a part between two flat faces. It is used to make parts that are too big to be formed in a closed die or in cases where only a few parts are to be made. The earliest forging machines lifted a large hammer that was then dropped on the workpiece, but now air or steam hammers are used, since they allow greater control over the force and the rate of forming. The part is shaped by moving or turning it between blows. Closed-die forging is the shaping of hot metal within the walls of two dies that come together to enclose the workpiece on all sides. The process starts with a rod or bar cut to the length needed to fill the die. Since large, complex shapes and large strains are involved, several dies may be used to go from the initial bar to the final shape. With closed dies, parts can be made to close tolerances so that little finish machining is required. Two closed-die forging operations are given special names. They are upsetting and coining. Coining takes its name from the final stage of forming metal coins, where the desired imprint is formed on a metal disk that is pressed in a closed die. Coining involves small strains and is done cold. Upsetting involves a flow of the metal back upon itself. An example of this process is the pushing of a short length of a rod through a hole, clamping the rod, and then hitting the exposed length with a die to form the head of a nail or bolt.