Radium salts, which have been found to _____ in bones, give rise to cancers of the bone.
She looks forward every spring to _________ the flower-lined garden.
There was a big argument among the children about _________ move to a new house.
In their country August 31st is a national holiday,________ everybody dances in the streets.
He is so easy-going a man _________ everyone wants to work with.
He tried his best to solve the problem,________ difficult it was.