Studies show that office workers are more ______to suffer from backache because they always sit before computer screens for long hours.                                   

The output of the gold mine is now four times _____ it was before liberation.

She doesn’t care about what others think; She’s  not at all ______ to other people’s feelings.

As to the subject, we have consulted the most _______ professor who gave us _______ explanation.

、Martha Berry was named one of _____ women in the United States.