几个简单的英语问题？谢谢大家！！！

这个项目将于8月15日完成。 译：This assignment will be accomplished on Aug.15th.
由于这个项目需要一些小的修改（小问题），所以需要推迟几天。 译;This assignment have to be delayed for several days because it needs some improvings.
不用担心，我们会准时完成这个项目 译：Don't worry,we will finish the assignment on time.
目前这些游戏（flash小游戏）还没有制作完成。 译：So far these flash games have not been made completely.
目前这些游戏（flashe小游戏）已经制作完成。 译：So far these flash games have been made completely.
目前这些游戏（flash小游戏）进行了修改，请替换。So far these flash games have been improved,please change.
这些小游戏是最新版本的。 译：These flash games are on the latest edition.
说英语“不用谢”和“不好意思”都有哪些？ 不用谢:you're welcome,that's all right.
和外国人打招呼”都有哪些？Hi,how is everything going,ah?
说“几月几日”是用 on 还是 in阿？总是分不清楚:有具体的月，日，星期几的用on,只有年的用in.

This project will complete on August 15.

Because this project needs some small revisions (small question), therefore needs to postpone several days.

Don't worry, we can punctually complete