Jack is late again. It is ______ of him to keep others waiting.[ ]

She is ready to help people ________.

We can never forget the days _______ the three astronauts in spaceship worked together and the days ________ we spent together [ ]

与例句句式相同的一项是(　) 例句：戍卒叫，函谷举。

下列各组词语中没有错别字的一组是（ ）