1.我和苏珊初识于高中，从此我们就成了最亲密的朋友。（ever since）
2.最近五年这个国家经历了一系列的暴乱和政治动荡。（see）
3.有一些迹象表明世界经济正在从不景气中恢复过来。（sign）
4.奥运金牌激励他克服生活中的种种困难。（over come）
5.是什么时候约翰改变了主意去参加民权运动？（强调句）
6.这些旨在减少政府开支的措施已经取得了一定的成效（aim at）
我自己写了，但是不知道对不对，我英语很烂的。有不对的地方，希望能够帮我改一下。（请符合括号内的要求）
1.Susan and I first known each other in high school.Ever since,we became the closest friends.
2.Recent 5 years,the country has seen a series of rebellions and pretical unrest.
3.Some signs indicated that the global economy is recovering from recession.
4.The Olympic gold medal inspired him to over come a variety of difficulties in his life.
5.When was it that John changed his idea to join in the Civil Rights Movement?
6.Those measures which were aimed at decreaseing government expenditure have taken effect.