Accordingtothepassage,quicksandisusuallyfound______.
A.onhillsides
B.farinland
C.nearwater
D.onprairies
正确答案:C[解析]见第二段第一句话,流沙通常存在于沿岸边和河床上。选项c最为接近。

Accordingtothepassage,quicksandisusuallyfound______.
A.onhillsides
B.farinland
C.nearwater
D.onprairies
正确答案:C