The vast grasslands of the High Plains in the central United States were settled by farmers and ranchers in the 1880s. This region has a semiarid climate, and for 50 years after its settlement, it supported a low-intensity agricultural economy of cattle ranching and wheat farming. In the early twentieth century, however, it was discovered that much of the High Plains was underlain by a huge aquifer (a rock layer containing large quantities of groundwater). This aquifer was named the Ogallala aquifer after the Ogallala Sioux Indians, who once inhabited the region.

much of the High Plains was underlain by a huge aquifer

underlain 位于或位于某下方

The vast grasslands of the High Plains were settled by farmers and ranchers in the 1880s.The vast grasslands of the High Plains has a semiarid climate, and The vast grasslands supported a low-intensity agricultural economy of cattle ranching and wheat farming. In the early twentieth century, however, much of the High Plains was underlain by a huge aquifer (a rock layer containing large quantities of groundwater). This aquifer was named the Ogallala aquifer after the Ogallala Sioux Indians, who once inhabited High Plains .

1. According to paragraph 1, which of the following statements about the High Plains is true

===========================================================================

○Until farmers and ranchers settled there in the 1880’s, the High Plains had never been inhabited.---------错误，不是never been inhabited.，而Indians once inhabited the region。

○The climate of the High Plains is characterized by higher-than-average temperatures.-------错误，没提及temperatures

○The large aquifer that lies underneath the High Plains was discovered by the Ogallala Sioux Indians.----错误，不是aquifer that lies underneath the High Plains，而是the High Plains lies underneath aquifer

○Before the early 1900’s there was only a small amount of farming and ranching in the High Plains.

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