Radium salts, which have been found to _____ in bones, give rise to cancers of the bone.
Lily didn’t come to the party last Sunday. ____,she would have made the party more exciting .
Great changes ___ in my hometown and a lot of factories _______.
It is well-known to us all that the dove is a ______ of peace .
No matter how low you consider yourself , there is always someone ___ you wishing they were that high.
Washing machines made by China have won ___ worldwide attention and Haier has become ____ popular name .