In the last sentence of the second paragraph, \”the higher places on earth\” refers to ______.
A. the high mountains
B. the lighter rocks
C. the vast ocean
D. the great continent
正确答案：D
44．答案为D根据第二段最后一句及第三段第一句coveringitswholesurfaceexceptforthehigherplacesonearththathadbeenformedfromthelighterrockmaterials．In1970scientistshadpiecedtogetherevidencethatthelighterrockmaterialshadformedonehugecontinentbyavastocean可知“较高的地方”不可能指选项B和C；选项A文中未提及
