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Exercise 3. Rewrite sentences using Complex Subject instead of clauses. Model: It seems that he stole the money.He seems to have stolen the money. 1. It seems that he knows everyone here.2. Until the XXth century, it was considered that cardiovascular disease was not a serious problem.3. It was reported that nearly a quarter of fatal attack victims were below age 65.4. Researchers found that bacteria which cause gum disease can travel through the bloodstream.5. It is likely that patients with gum disease more often suffer from narrowing of the arteries.6. Many dermatologists believe that refined carbohydrates trigger inflammation in the skin.7. The WHO experts suppose that the number of diabetics will double by 2030.8. It is said that the first book devoted entirely to dentistry appeared in the XVIth century.9. It is known that ancient Romans could make false teeth and even removable dentures from ivory.10. It is considered that the hardness of porcelain is very high.