常用词汇Unit1精题练****与答案 精题练****br/> (一)选词填空,完成下面句子。 [A]thick [B]darkness [C]asserted [D]continuously[E]blaze [F]atmosphere[G]outlines [H]contained [I]salty [J]immediately [K]process [L]barely [M]worn [N]poured [O]abundant When the earth was born, there was no gradually cooling earth was enveloped in heavy layers of cloud,which 1 much of the water of new a long time its surface was so hot that no moisture could fall without 2 being reconverted to dense, perpetually renewed cloud covering much have been so 3 that no rays of sunlight could penetrate so the rough 4 of the continents and the empty ocean basins(盆地)were sculptured out of the surface of the earth in 5 . As soon as the earth’s crust cooled enough,the rains begin to fell 6 ,day and night,days passing into months, into years, into 7 into the waiting ocean basins, or, falling upon the continental masses,drained away to become sea. That primeval(原始的)ocean must have been only faintly 8 .But from the moment the rains began to fall, the lands began to be 9 away and carried to the sea. It is an endless, inexorable(不可动摇的) 10 that has never stopped—the dissolving of the rocks, the leach