扫描二维码，直接登录
题库 / Prep2008E2-SC-219
Fossils of the arm of a sloth found in Puerto Rico in 1991, and dated at 34 million years old, made it the earliest known mammal of the Greater Antilles Islands.
sloth found in Puerto Rico in 1991, and dated at 34 million years old, made it the earliest known mammal of
sloth, that they found in Puerto Rico in 1991, has been dated at 34 million years old, thus making it the earliest mammal known on
sloth that was found in Puerto Rico in 1991, was dated at 34 million years old, making this the earliest known mammal of
sloth, found in Puerto Rico in 1991, have been dated at 34 million years old, making the sloth the earliest known mammal on
sloth which, found in Puerto Rico in 1991, was dated at 34 million years old, made the sloth the earliest known mammal of
题目分析：
略。
选项分析：
A选项：首先，由于本选项的dated是过去分词（不可能是过去时，因为date理应是被动语态，若是谓语动词的过去时应该用were dated），所以其引导的部分应该同found in Puerto Rico in 1991平行。鉴于此，and dated at 34 million years old身前和身后的逗号是不应该加的（只有三者平行或者两个完整的句子间的and前才应该加逗号）。
B选项：在语法上，代词they没有指代对象；that不能用于引导非限定性定语从句；has been的主语的核心词是Fossils，应该用have been。
C选项：that was found in Puerto Rico in 1991只能修饰单数名词，而其逻辑上的先行词应为fossils；was dated at 34 million years old主谓一致错误同(B)。
D选项：Correct. 本选项在语法和逻辑上均是正确的。分词短语making the sloth the earliest known mammal on the Greater Antilles Islands是伴随状语。
E选项：was dated at 34 million years old主谓一致错误同(B)；主语fossils和谓语动词made之间不应添加逗号，例如：
(1) I play cards.
(2)** I, play cards.
句(2)是错误的，不能用逗号隔开主语和谓语动词。（有时因有插入语导致谓语动词身前有逗号，这不矛盾。因为那个逗号是用来隔开插入语和主句的，不是用来隔开主语和谓语动词的。语法上不允许有目的是为了隔开主语和谓语动词的逗号）
300 meters of the park，这里的of表示时间/距离/面积等，离公园300米远
如果要用2、3是同一件事的逻辑来组织句子，要把made去掉：Fossils of the arm of a sloth found in Puerto Rico in 1991 were dated at 34 million years old and were the earliest known mammal of the Greater Antilles Islands.化石形成于很早以前and化石是被发现的最早的哺乳动物，ok
没有逻辑关系及逻辑关系近似于两件事相等及两件事的时间框架不一致的，用and并列句，不用主句+状语
如：木船是最早的建造船的案例，and木船代表了重大进步；人们在路边扔瓶子and垃圾越来越多；猎豹数量不到100只and猎豹数量比大熊猫少；注册学生数更多了and公立学校的学生数量平稳增加；
dated与found都是过去分词，共同修饰fossils，and前面不需要逗号；fossils使得sloth成为earliest known mammal逻辑意思不对，应该是年份鉴定的结果使之成为earliest known mammal；it指代不清楚，代词难以指到介词的宾语
逻辑主语也是正确的
简化为：Fossils made it the earliest known mammal 。 但是是Fossile 被追溯到具体年份的这个事件使得 sloth 被认为是最老的mammal。
D选项 ，making the sloth the earliest known mammal 作为 伴随状语，修饰 have been dated at 34 million years old，显然会更好些。
(1) I play cards.
(2)** I, play cards.
句(2)是错误的，不能用逗号隔开主语和谓语动词。（有时因有插入语导致谓语动词身前有逗号，这不矛盾。因为那个逗号是用来隔开插入语和主句的，不是用来隔开主语和谓语动词的。语法上不允许有目的是为了隔开主语和谓语动词的逗号）
B中主谓一致错误；they无指代；that不能引导非限制性定语从句。
C中that was部分只能修饰单数先行词，而逻辑先行词是fossils。且有主谓一致的错误。
E中主谓用逗号隔开只存在中间有插入语的情况，而不是中间有从句的情况，此外有主谓一致问题。