托福阅读总结题主要考查学生理解和识别主要内容和文中所提及重要的信息。有六个选项，你可以从中选出三个最能表达主要思想的句子。这类考题分值是2分，选出三个得2分，选出2 个得1分，顺序选择不影响得分。那么，在以下内容中我们就为大家带来一些相关的范例，希望能为大家的备考带来帮助。
例题2：Depletion of the Ogallala Aquifer
The Ogallala is a large underground source of water in the High Plains region of the United States.
Answer choices
1. The use of the Ogallala for irrigation has allowed the High Plains to become one of the most productive agricultural regions in the United States.
2. Given the aquifer’s low recharge rate, its use for irrigation is causing water tables to drop and will eventually lead to its depletion.
3. Releasing capillary water and introducing drought-resistant crops are less-promising solutions to the water supply crisis than bringing in river water
4. The periodic deepening of wells and the use of more-powerful pumps would help increase the natural recharge rate of the Ogallala.
5. In Texas, a great deal of attention is being paid to genetic engineering because it is there that the most critical situation exists.
6. Several solutions to the upcoming water supply crisis have been proposed, but none of them promises to keep the costs of irrigation low.
