1.Only by concentrating on study can you pass the exam.2.Don't expose your skin to the sun, or you will get sunburned.3.He is dying to get in touch with hie daughter.4.According to plenty of facts,we drew several different conclusions.5.It's really a good idea to divide children into 8 small groups.6.Eison's ideas were based on the scientific experiments.7.What he said was based on the fact.8.The story was written based on the real life.9.Some modern languages are based on latin.