用括号内所给词的适当形式填空（每空不限一词）。

①The ____ (thirty-one) Olympics will be held in Brazil（巴西）in 2016.

②It was____  (care) of Jim to leave the tap running all night.

③— Which do you think is ____  (valuable), time or money?

— Time, I think. When time is gone, it never comes back.

④Usually, books for children ____ (write) in simple languages.

⑤— Could you tell me how ____ (succeed) in making a speech in front of people?

— Be confident. That's the point.