關於TPO11聽力講稿一句話 - 英檢

Science writing, history, political analysis and so forth aren't literature,
perhaps, but they are often of high quality and these kinds of books can be
just as creative and round-written as a novel or a play.

請問of high quality 是修飾哪個名詞呢 怎麼前面突然出現are?

是不是跟tpo 7的聽力 habitat selection裡面的

For example, in Europe studies have been done of blackcap warbler.

和這句的一樣呢

我兩句都看不太懂他的語法是怎樣 有人可以幫忙解釋一下嗎

謝謝.

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