It was ________ she got home ________ she found her diamond necklace missing.

________ they become dirty, the lakes are not able to clean themselves

Information has been put forward ____more middle school graduates will be admitted into universities.

Your composition is written very well ______________ some spelling mistakes.

________ makes mistakes must correct them.

It is pretty well understood_______controls the flow of carbon dioxide in and out of the atmosphere today．   

Many animals sleep a lot when young, but sleep much less when they get older, just________is the case with human being.

---Mr. Parker is so ambitious. He is seeking any opportunity to get promoted.
---That’s understandable. ________you are in our company determines how well you are paid and________you can do with your life.

At the Copenhagen conference, all the countries were called on to do all they could to control greenhouse gas emissions________it was too late.

At present there is a fierce debate over the question_______ human cloning should be allowed.