Failure hurts adults and children ______ , but it can make a positive contribution to your life once you learn to use it.

        ，the wind died down and people began to appear on the street.

A firm from New Zealand has revealed a set of robotic legs which they claim will soon allow ________ wheelchair-bound people to walk again.

I have searched ________ for the book but couldn’t find it.

I think you’ve got to the point where a change is needed , _____, you’ll fail .