语法填空
There are two ways to look at this question ____relating to eggs in general or to the chicken egg specifically. Either way, the answer is the same: the egg came before the chicken.____ the case of eggs in general, animals such as dinosaurs were laying eggs long before the modern chicken came into existence,____ (mean) that in this sense, the egg predated (早于) the chicken by thousands of years. As for the chicken egg specifically , according to NPR's Robert Krulwich, the modern chicken____ (hatch 孵化) from an egg, meaning the egg came first.
The key to understanding the answer, and indeed the question itself, is to understand what the question is getting at. The dilemma is to understand ____ a chicken-like bird transformed into____ is known as a modern chicken after being hatched or whether two chicken-like birds ____ (lay) and fertilized an egg that then hatched a fully formed chicken. In this case, the latter option is the most realistic, therefore answering the question of which came first.____ (essential), a bird that was similar to a hen and another bird that is similar to ____ rooster combined their genetic material, leading to a gene mutation (突变) that resulted in the chicken that is____(good) known and loved today.
