程开甲先生去世了，怎么评价他的一生？ 以程开甲院士为代表的老一辈科研工作者，包括前几年感动中国，已逝的林俊德将军（程老学生）他们一生为国…
1、你去过长城吗？去过.我是1980年去那儿的. 1.Have you ever been to the Great Wall？Yes，I have.I went there in 1980.2.Since he went to America，he hasn't written to me yet.3.The White have lived here for ten years.4.Workers have built many new ho.
“我在上海居住了十年”用英文怎么讲？ I have lived in Shanghai for ten years
