The gym is a public place, so you should be ________ and leave all the machines clean after using them.

The boss went into the house ,_______ the five boys _______ in the rain.

After months of voyage, Columbus arrived in_____ later proved a new continent.

下列各句中加点成语使用恰当的一项

She was very happy because she _____ play the lead role of a young princess in the Hollywood film.