（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。
（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？
偶在下载的材料中也遇到过，当时就没搞清楚！sigh
（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？
三个以上的并列指的是a white dwarf， a neutron star， or a black hole吗? 如果是应该是很正常为什么说a white dwarf， a neutron star， or a black hole之间的并列，用whether 就是正常的呢？
请指点！
对不起，还不是很清楚，就是说whether...or...是选择性并列的标志的标志短语，有or出现就可以用whether喽？
用AND连接三个或以上的并列是不是很正常啊？
OR的用法一样啊，只是AND用于肯定句，OR用于否定句或选择句。
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