在托福阅读备考的练习中，想要快速的提升自己的托福阅读能力，除了不断的累积自己的词汇和句型之外，从TPO练习入手也不失为一个不错的方法。那么，在以下内容中，我们就为大家带来TPO4托福阅读词汇，希望能为大家托福阅读备考带来帮助。
Paragraph 1: Petroleum, consisting of crude oil and natural gas, seems to originate from organic matter in marine sediment. Microscopic organisms settle to the seafloor and accumulate in marine mud. The organic matter may partially decompose, using up the dissolved oxygen in the sediment. As soon as the oxygen is gone, decay stops and the remaining organic matter is preserved. 【TPO4- Petroleum Resources】
1.The word “accumulate” in the passage is closest in meaning to
○grow up
○build up
○spread out
○break apart
答案：(2)
