四级翻译：
1. ____________(直到我们在一起待了几个星期) that I found we had a lot in common.
2. It is of great importance that _______________________(所有渴望进步的年轻人) learn to get on well with each other.
3. Had I been in your place, _______________(我会抓住每个晋升的机会).
4. What an important place for military affairs! It’s worth _______________(以生命代价去捍卫).
5. ___________________(这位学者是否有资格进行学术研究) remains uncertain among the community of computer science.