这道题是全划线的，我选了D选项。整个句子划线这种题老做不好，老师帮忙解惑~ Even though Clovis points, spear points with longitudinal grooves chipped onto their faces, have been round all over north America ,they are named for the new Mexico site where whey were first discovered in 1932 A. Even though Clovis points , spear points with longitudinal grooves chipped onto their faces, have been found all over north America, they are named for the new Mexico site where they were first discovered in 1932. B. Although named for the new Mexico site where fist discovered in 1932. Clovis points are spear points of longitudinal grooves chipped onto their faces and have been found all over north America . C. Named for the new Mexico site where they have been first discovered in 1932, Clovis points, spear points of longitudinal grooves chipped onto the faces, have been found all over north America . D. Spear points with longitudinal grooves that are chipped onto the faces ,Clovis points , even though named for the new Mexico site where first discovered in 1932, but were found all over north America . E. While Clovis points are spear points whose faces have longitudinal grooves chipped into them ,they have been found all over north America ,and named for the new Mexico site where they have been first discovered in 1932