article, comma, hyphen
The usage of these items is difficult for me.
1
Why doesn't "unified theme" need the definite article in the sentence below.
I sometime can not decide whether I should use the definite article or zero article.
"As you are doubtless aware, you need to develop a picture of the thesis as a whole, to have a clear idea of the argument or unified theme and how to structure, as well as to understand the relevance and role of each part."
Another question is What "As" stands for in this sentence.
2
Do ", weather" and "-and the fact ........-" mean same thing the mice fighters?
"The mouse invasion ended in April, the time of the cold and rainy season in Australia. Thanks to the mice fighters, the weather- and the fact that the mice ate many of their own kind- the battle was over."
Why does this sentence need hyphen? It seems that I can take away those hyphen. Can I?
Thanks a lot.