It is insisted that the One-China        should be the basis for the development of relations between the mainland and Taiwan. 

 His name is on the _______ of my tongue, but I just couldn’t remember it.

The stronger the __________ is,the more quickly a person will learn a foreign language.

Mr. Wang gave the whole class a vivid _________ of his trip to Shanghai Expo Park.

As we know, too much ________ to Xrays can cause skin burns, cancer or other damage to the body.