Which sentence best describes the main idea of the passage above?

哪句话能最好地诠释以上文章的主要思想？

youdao

Reading the first sentence of each paragraph before you read the whole text helps you get the main idea quickly.

在阅读全文之前，先阅读每一段的首句可以帮助你快速掌握文章大意。

youdao

Now write down the main idea of each section in one well-developed sentence.

现在你要把每个分段的中心思想都用一句整话写出来。

youdao

But in the United States, the main idea of each paragraph should be in the first sentence.

VOA: special.2009.04.30