求一篇用现在完成时,和过去完成时写的作文,20；40之前

题目

求一篇用现在完成时,和过去完成时写的作文,20；40之前

答案

I have ever been to Shanghai for two times.Shanghai is a very beautiful city with a long history.I knew that many imperialist countries had invaded it.People said a lot of treasures had been grabbed b...