It is not clear to what extent Solvency 2 applies to their non-European subsidiaries.问："to what extent Solvency 2 applies to their non-European subsidiaries."是固定句型吗？这是介词短语作主语吗？
...：A new kind of vehicle is taking to the roads, and people are not sure what to make of it. Is it safe?中文：种新型的汽车出发上路，而人们却不确定如何看待它。它安全吗？请问：这里的 what to make of sth 什么理解？what to 与 make of it 是分开的？
原文：I soon
learned to know this flower better. On the little prince's planet the flowers
had always been very simple. They had only one ring of petals; they took up no
room at all; they were a trouble to nobody. One morning they would appear in
the grass, and by night they would have faded peac...
...w, one-eyed stare.Where to find comfort?There was a house I knew. A simple little house in the
woods. I had stolen food there once or twice. That was where I went.其它英文小说和普通读物中这类问句也不少见。由此可知，“Wh-疑问词+to不定式”结构除了作为非独立...
Consequently, what should be an enjoyable time can become an
imposition, as well as a disappointment at the same time.an enjoyable time can become an imposition是一个完整句子，请问前面的what should be作什么成分？
More important, people are often alone, providing a rare freedom that extends to the evocative music they choose.解析说这里more important=what is more important, 那么what is more important 这里是作为关系代词做主语引导的状语从句吗？