When designing your house, you'd better ____ land for a garden．

Radium salts, which have been found to _____ in bones, give rise to cancers of the bone.

They are broadening the bridge to ____ the flow of traffic．

It took Joan a long time to _______ a new dress at the store.

The British science fiction writer, Isaac Azimac, believes that robots are_____ ever to do harm  to a human being.