1) If these tests produce positive results, 2) If rubber is cooled to -200° C,
3) If safety measures had been followed,
4) If you want to study the files from the internet,
5) If we bought a new software package,
6) If you want to use this software package on more than one system,
7) If the goods had been sent by sea,
8) If we ran an additional test,
a) the accident would never have happened.
b) download them onto your computer.
e) we'd be able to do all the technical specifications in half the time.
d) we could estimate the experimental error.
e) they would have taken nearly two months.
f) it becomes brittle and will break.
g) we'll continue with clinical trials.
h) you'll have to get a site licence.

1. What are you ( doing) here at such a late hour? Are you ( writing) your composition? — No, I (have written) it already. I (am working) at my report. — And when did you ( write) your composition? — I ( finished) it two days ago. 2. I say, Tom, let's have dinner. — No, thank you, I have already ( had) dinner. 3. What is the weather like? Is it still ( raining)? — No, it (has stopped) raining. 4. Please give me a pencil, I have lost mine. 5. I (have not  met) Peter since Monday. 6. Nina has just ( finished) work. 7. Where is Sergei? — He (has gone) home. He ( left) the room a minute ago. 8. What are you ( reading) now? — I (am reading) "Jane Eyre" by Charlotte Bronte. 9. They ( read) "Ivanhoe" by Walter Scott a month ago. What about you? Have you ( read) "Ivanhoe"? 10. My watch (has stopped). There (is) something wrong with it. 11. Have you ( seen) Jack today? — Yes, I ( saw) him at the institute. 12. Have you ( heard) the new symphony by M.? — Yes, I have. — When did you ( hear) it? — I ( heard) it last Sunday. 13. You (have  changed) so much. Has anything ( happened)?

Family ConflictsКонфликты в семьеEvery family has problems because there are no ideal relationships. Conflicts usually appear between parents and their teenage offsprings. Wise parents try to decide such problems without insulting or pressurizing children. Teenagers are rather sensitive. They are going through a difficult period, when they have to choose future occupation, friends, interests. It’s also the time of first love and tears. So, parents should understand this and try to help them instead of useless moralizing. One of the most difficult problems among adults and youngsters is the struggle for independence. At some point children realize that they want to be independent, they don’t need help or advice from parents. They want to be left alone and to decide for themselves. That’s when family conflicts start. The only solution is to hear each other and to talk about it. Unfortunately, teens don’t understand that some things or situations can be dangerous and can have unwanted effects. This is the time when many youngsters try alcohol, cigarettes or drugs, not knowing that this one try can ruin all their life. They don’t understand that parents have gone through this and know how behave in certain situation. Meanwhile, adults should understand that their children are no longer kindergarten kids. They have grown and they need special attention. Family conflict is not a disaster. It can be solved if treated sensibly. There are many family therapists and psychologists nowadays, who help to solve such problems. The main condition is not to let it become too deep.