Диалог на моя любимая телепередача

Sam: Betty, quickly turn on the 5th channel.  
Betty: Why? What's on?  
Sam: My favourite TV show starts now.
Betty: You mean that program about science and technologies? 
Sam: Yes, exactly. They tell lots of interesting things about new technologies.
Betty: Do they tell you that watching too much TV is unhealthy? 
Sam: Come on, Betty. Don't be a bore. 
Betty: Well, I wouldn't if you hadn't occupied the only TVset in the house for twenty-hours a day 
Sam: This show lasts only for half an hour. Then I'll let you watch what you want. 
Betty: Ok, turn it on.
 Sam: Look! They are speaking about the history of TV  
Betty: That's exatly what we need to know right now. In my opinion, TV was invented long before we were born. 
Sam: Of course. Along with the radio it was one of the earliest broadcasting tools. The first mechanical televisions were sold in 1928. Later on, there were the first mass-produced units.
Betty: Well, the TV was black-and-white then. When did the color TV appear?  
Sam: As far as I know, they came into wide use in late 1960s.
Betty: I still remember our first TV. It seems to be so old-fashioned now, when there are thousands of digital, LCD, plasma TVs.
Sam: You're right. We've also had a video recorder, which was gradually replaced by DVD player.  
Betty: Why do people invent so many unnecessary devices? 
Sam: Why unnecessary? I think they all make people's life easier. It's called the technological progress. Each year, there are newer devices launched on the market. Imagine how you would live without a vacuum-cleaner or a microwave. These automatic machines are nearly in every house today.
Betty: On the one hand, you are right. We really need such devices like washing machine, microwave, dishwasher, vacuum cleaner in the house. However, when it comes to TV, I think that we could easily live without it.
Sam: You're saying that because you have a computer. If you didn't have it, you would watch TV more often.
Betty: That's true. I watch most of the films on my laptop.
Sam: In my opinion, computer is the same TV only with additional information and facilities. It also has a screen and you can watch whatever you like on it.
Betty: Yes, but in addition I listen to music, type my homework, chat with my friends, edit photos, read the news and find all the necessary information via Internet.
Sam: I still think that TVset is a great invention. In fact, many modern TVs allow you to connect laptop or any other devices to it so that you can work on a larger screen.

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1) As soon as she finished cooking dinner, the bell rang

2) When she was cooking she was talking on the phone

3) By the time the phone rang, she had everything ready

4) She entered, took off her coat and went to the kitchen, took the food out of the refrigerator, put it on the table and began to cook

5) When the guests came, she watched TV because she had already prepared everything in advance

6) When the guests came, she set the table, although she did everything by the time spent

7) She prepared everything in advance so she had problems

8) When the guests come, she cleaned the apartment, went shopping in the store and prepared to cook delicious pizza for dinner

9) As soon as the guests left, she had to leave for work

10) By ten o'clock in the evening, she returned home