striving和 pursuit 区别

看一下这句话：it is worth striving without ceasing to pursue my dream for my future
最后的for my future加上好还是去掉好?

请问各位老师一个英语问题：cherish what you have now,and striving for the future.
1,以上这句话前半部分属于定语从句吗?
2,后半部分为啥要用striving?为啥不能用shrive,不是有个连接词and吗?
3,striving for the future属于什么结构吗?

英语翻译
Six
The striving of countries in Central Europe to enter the European Union may offer an unprecedented chance to the continent's Gypsies （or Roman） to be recognized as a nation,albeit one without a defined territory.And if they were to achieve that they might even seek some kind of formal place—at least a total population outnumbers that of many of the Union's present and future countries.Some experts put the figure at 4m-plus; some proponents of Gypsy rights go as high as 15m.
Unlike Jews,Gypsies have had no known ancestral land to hark back to.Though their language is related to Hindi,their territorial origins are misty.Romanian peasants held them to be born on the moon.Other Europeans （wrongly） thought them migrant Egyptians,hence the derivative Gypsy.Most probably they were itinerant metal workers and entertainers who drifted west from India in the 7th century.
However,since communism in Central Europe collapsed a decade ago,the notion of Romanestan as a landless nation founded on Gypsy culture has gained ground.The International Romany Union,which says it stands for 10m Gypsies in more than 30 countries,is fostering the idea of “self-rallying”.It is trying to promote a standard and written form of the language; it waves a Gypsy flag （green with a wheel） when it lobbies in such places as the United Bations; and in July it held a congress in Prague,The Czech capital.Where President Vaclav Havel said that Gypsies in his own country and elsewhere should have a better deal.
At the congress a Slovak-born lawyer,Emil Scuka,was elected president of the International Tomany Union.Later this month a group of elected Gypsy politicians,including members of parliament,mayors and local councilors from all over Europe （OSCE）,to discuss how to persuade more Gypsies to get involved in politics.

They worked very hard (striving for) a breakthrough in a carner research.
这句striving 分词引导的状语从句 为什么要用现在分词,用过去分词行吗?

In order to gain a bigger share ,many companies are striving__their products more competitive.
(A)to make(B)making(C)to have made(D)having made