GWD-13-28

mejor

making this 显然不如making the sloth好，后者指出了明确的指带对象，是正确答案的标志。

dudegmat2006

D;

A-incorrect use of past tense "made" when, apparently, the sloth continues to be the earliest known mammal of the Greater Antilles; a condition which requires the progressive tense "making" to accurately relate the ongoing nature of the condition;

B-"they" has no clear referent, plus, the construction is awkward in the terminal clause;

C-subject-verb agreement error--"Fossils" is plural, "was" is singular;

E-combines the problems of A and C.

mymengming

以下是引用opeman在2004-6-23 11:44:00的发言：

Don't trust the answerd provided by GWD....It has to many errors. Trust your feeling!!

同意D

这位斑斑，要是ETS也相信我的feeling就好了，我就杀也不用看了，每天在那feeling^_^

xlhu

Agree with upstairs!!

zhangyf0305

支持D

ecochem

比较5个选项，只有D好点

只能选D啦

yaomao

OG上说过：the present perfect tense describes an actiom that occured at an indefinite time in past

这样就可以解释D中为什么用现在完成时了吧。

jellysun

前面某位提到的og211:
211.    The period when the great painted caves at Lascaux and Altamira were occupied by Upper Paleolithic people has been established by carbon-14 dating, but what is much more difficult to determine are the reason for their decoration, the use to which primitive people put the caves, and the meaning of the magnificently depicted animals.
(A) has been established by carbon-14 dating, but what is much more difficult to determine are
(B) has been established by carbon-14 dating, but what is much more difficult to determine is
(C) have been established by carbon-14 dating, but what is much more difficult to determine is
(D) have been established by carbon-14 dating, but what is much more difficult to determine are
(E) are established by carbon-14 dating, but that which is much more difficult to determine is
Two instances of subject-verb agreement must be observed in this sentence: The period... has been established and what is much more difficult to determine... is. Both clauses have singular subjects and must have singular verbs. Only B, the best choice, observes these requirements. A incorrectly uses the plural form are in the second clause. Choices C and D incorrectly use the plural form have in the first clause, and D incorrectly uses are in the second clause as well. E incorrectly uses the plural form are in the first clause. Furthermore, because the date of the period in question was established before the writing of the sentence, the verb of that clause must be in the present perfect form (has been established).

看解释的最后一句：furthermore..

fionajiang

以下是引用shzzhengfan在2006-5-22 18:38:00的发言：

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.

 

 

1. sloth found in Puerto Rico in 1991, and dated at 34 million years old, made it the earliest known mammal of
2. 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
3. sloth that was found in Puerto Rico in 1991, was dated at 34 million years old, making this the earliest known mammal of
4. sloth, found in Puerto Rico in 1991, have been dated at 34 million years old, making the sloth the earliest known mammal on
5. sloth which, found in Puerto Rico in 1991, was dated at 34 million years old, made the sloth the earliest known mammal of

C最明显的错误请看黄色标注

爽,终于有人说出来了

RichardTian

A的[逗号+and]是个错误，正如前面某位台湾兄弟所言，两个动作的平行结构，and之前是不要逗号的。
遇到[逗号+and]，就赶紧看看它是不是三个或者三个以上以上平行并列成分的最后一个，如果不是；再看它是不是连接两个句子；如果都不是，就差不多该排除了。

C的问题除了楼上所标出的黄色警示之外，making this the ...中的this在此处是个光杆司令，记得XDF的老师说，这种情况下this,that等代词裸奔一般为错。