1.My father is a progressive-minded man.

4.在争取和平的斗争中，谁不和人民一道前进，谁就间接帮了战争贩子的忙。

3.世界进步人士把中国的解放看做是对世界和平与民主的巨大贡献。

2.中国人民在争取自由和独立的斗争中，经历了一段艰苦的岁月。

1.为了建设新中国，我们需要大批技术人员和科学家。

4.Science is useful because it can benefit mankind,but it is also dangerous because it can bring harm to people if used by evil-doers.

3.The English language is difficult, but it is less difficult than the Russian language because its grammar is much simpler.

2.In Mr. Wang's house I met several college students, all of whom were engaged in revolutionary work.

1.I was reading while she was writing.或

While I was reading,she was writing.

5.in, at　 6.of, up　 7.in, with　 8.on, in