Please fill in the blanks with the proper words(that, whether,who(ever), which(ever), what(ever)，where(ever), when(ever), why, how,where(ever), when(ever), why, how）1._______the earth travels round the sun is a –well-known fact.2.___________the artist can do it or not is uncertain.3._______he did it remains a mystery.4.______breaks the law will be punished.5.______people cut down too many tress destroyed the balance of nature.6._______we will go camping tomorrow depends on the weather.7.________the solid shape would last or not is not clear.8._______you will win the medal seems unlikely.9._________will take part in the meeting has not been decided.10. _________student will win first is uncertain.11. _________I can’t understand is why he has changed his mind.12. _________fails to see this will make a mistake.13.________wassaidheremustbekeptsecret.14.___________ we should leave it is a problem.15.___________he will be back depends on the weather.16.__________this happened is not clear to anyone.17._________these Greek statues are in a British museum is an important part of our story today.18.____________they would support us was a problem19.. ___________________(遗憾的是)that we lost the game.20. ___________________(惊奇的是)that he cheated in the exam.