以d结尾的单词怎么变复数

　　It wasn't so good as last time.

　　这次不如上次好。

　　A change of job would do you the world of good.

　　换一下工作会对你大有好处。

　　There wasn't much traffic so we made good progress.

　　来往车辆不多，所以我们开得很快。

　　The team put on a good show in the competition.

　　这支队伍在比赛中有上佳表现。

　　There have been some problems but basically it's a good system.

　　虽然出现过一些问题，但这基本上仍不失为一个好系统。