请教大全840和31

（1）The United States petroleum industry's cost to meet environmental regulations is projected at ten percent of the price per barrel of refined petroleum by the end of the decade.
（A） The United States petroleum industry's cost to meet environmental regulations is projected at ten percent of the price per barrel of refined petroleum by the end of the decade
（B） The United States petroleum industry's cost by the end of the decade to meet environmental regu1ations is estimated at ten percent of the price per barrel of refined petroleum
（C）By the end of the decade， the United States petroleum industry's cost of meeting environ mental regulations is projected at ten percent of the price per barrel of refined petroleum
（D） To meet environmental regulations， the cost to the United States petroleum industry is estimated at ten percent of the price per barrel of refined petroleum by the end of the decade.
（E）It is estimated that by the end of the decade the cost to the United 5tates petroleum industry of meeting environmental regulations will be ten percent of the price per barrel of refined petroleum.

答案选E，不知其他错在何处，尤其是be projected at 和 be estimated at 区别何在？请斑竹指教。

A, B, 和C 中的The United States petroleum industry's cost 应改为sth of sth, D和E的by the end of the decade位置不一样,D中by the end of the decade会有歧义, 不知是estimated的时间还是the cost to meet the regulation的时间. 另外, D中is不能和by the end of一起用.

be projected at 指的是计划....和 be estimated at 是估计...

（2） A star wil1 compress itself into a white dwarf, a neutron star, or a black hole after it passes through a red giant stage, depending on mass.
（A）A star will compress itself into a white dwarf, a neutron star， or a black hole after it passes through a red giant stage， depending on mass
（B）After passing through a red giant stage， depending on its mass， a star will compress itself into a white dwarf， a neutron star， or a black hole。
（C）After passing through a red giant stage， a star's mass will determine if it compresses itself into a white dwarf， a neutron star， or a black hole
（D）Mass determines whether a star， after passing through the red giant stage， will compress itself into a white dwarf， a neutron star， or a black hole
（E）The mass of a star， after passing through the red giant stage， will determine whether it compresses itself into a white dwarf， a neutron star， or a black hole

答案是D，whether 后居然可以跟三个以上的并列，我还是第一次见，大家见过吗？