Fill in each of the blanks in the following sentences with a suitable preposition or adverb.1. The old man is regarded ______one of the best doctors in town; he has practiced medicine for over thirty years.2. They have been very good friends for so many years, but they have nothing ______common.3. Although he comes ______a very poor family in a small western town, the young man has become highly successful in his career.4. In contrast ________her younger sister, Jane is always kind and friendly to other people.5. At this time of year, the weather in the south of China is warm ______general, so you needn’t take your heavy coat with you.6. ______addition to the apples you asked for, I bought you some oranges in the fruit shop.7. The young man is usually _________the first to arrive at the office, although he lives far away from the company where he works.8. He took over his father’s business ______a young age and now he is already worth one billion dollars.