認(rèn)真的英文單詞怎么寫

　　例句：

　　I like earnest pupils.

　　我喜歡認(rèn)真的學(xué)生。

　　I'm sure he was earnest when he said he would come.

　　我相信他說他會(huì)來是認(rèn)真的。

　　The matter claimed our serious attention.

　　這件事需要我們認(rèn)真注意。