Pete asked: What's the weather like today?
1. Pete asked what was weather like today.
2. Pete asked what the weather was like today.
3. Pete asked what the weather was like that day.

London University is one of the (highly) appreciated universities in the world, therefore, I wanted to be accepted there. But I was lucky and I was accepted there. I (had to) make two trips to London before I started one for the interview and another to find accommodation. The university provided students with information about flats. By the time the semester began, I (had already found) a place to live and a roommate. While I was studying, I didn’t think about work and how I (am earning) my living after university. When the time came, I realized that languages had always interested me so I applied for several jobs to teach English abroad. Obviously, I didn’t have any experience but I thought I had a small chance of (being accepted). In the end, a letter came and I felt nervous as I opened it. But the news (was) good! The letter offered me a job in a Swedish school. I knew the winter weather in Sweden was cold so I bought some warm clothes. Then I had a farewell party and everyone wished me good luck in my new life as a teacher. Since then I (have had) a lot of jobs in different countries and I am happy to say that I have enjoyed all of them. But I have wondered many times what (would have happened) if that first letter had turned me down.

1. Some helping in exchange of information is provided by scientific conferences.
2. He demonstrates some insisting on addressing this issue.
3. Being engaged in collecting material for a new article is my occupation now.
4. Arising of this error from the use of approximate methods occurs
often.
5. Aiming at obtaining accurate data on this issue - that is what the efforts of many scientists are focused on.
6. In this connection, other studies in this field are worth mentioning.
7. In this article, suggesting the usage of the same principle when considering more complex systems is done by the author.
8. Preventing a new series of experiments from being conducted  is caused by the lack of accurate data.
9. Trying to answer this question has been performed by scientists for a long time.
10.  The reason for some differing in providing more accurate data lies in this method.