Sentence Correction

A "calendar stick" carved centuries ago by the Winnebago tribe may provide the first evidence that the North American Indians have developed advanced full-year calendars basing them on systematic astronomical observation

a) that the North American Indians have developed advanced full-year calendars basing them on
b) of the North American Indians who have developed advanced full-year calendars based them on
c) of advanced full-year calendars by north American Indians, on the basis of
d) of the North American Indians and their development of advanced full-year calendars based on
e) that the North American Indians developed advanced full-year calendars on the basis of

OA: later

Cannot be B,C,or, D as it indicates that the stick was the first evidence of the North Americans.

Going for E as it describes something that happened in the past.

A "calendar stick" carved centuries ago by the Winnebago tribe may provide the first evidence that the North American Indians have developed advanced full-year calendars basing them on systematic astronomical observation

a) that the North American Indians have developed advanced full-year calendars basing them on - problem with the A is that "them: has no clear antecedant, are we talking about indians or calendars?
b) of the North American Indians who have developed advanced full-year calendars based them on - "them" has no clear antecedant
c) of advanced full-year calendars by north American Indians, on the basis of - slightly changes the meaning, calendar stick = evidence of the fact that north american indians developed advanced calendars
d) of the North American Indians and their development of advanced full-year calendars based on - changes original meaning
e) that the North American Indians developed advanced full-year calendars on the basis of -correct

IMO E

OA : E

tnks guys !!

Hi,

Can someone tell me why we cannot use "have developed" in the statement. Also, Is there any idiom like "Evidence of" or "Evidence that" ?

Thanks in Advance!!

The effect of the advanced full-year calendars prepared by the North American Indians is not known from the sentence to be present now. So the thing is past and hence we may not use "have developed" in the sentence.

'evidence of' and 'evidence that', both are correct but we should be wary of the information that follows it because the info is not interchangeably similar.

Hope this helps..

kvcpk wrote:Hi,

Can someone tell me why we cannot use "have developed" in the statement. Also, Is there any idiom like "Evidence of" or "Evidence that" ?

Thanks in Advance!!

"have developed" represents present perfect tense. We use the Present Perfect Tense to talk about an action which started in the past and continuous up to now.

If we use "Evidence of", then "of" has to be followed by a noun or a noun phrase.

Hope that helps...

Thanks for your inputs.

What is OA of this question?
As per my understanding the calendar is still in to existence so usage of 'have developed' would be fine.
E.g : I have developed a robot, which can speak different languages.

In A, is there any issue with the usage of 'basing them on'?

In A, if I use COMMA after calendars then the sentence would be correct?
the North American Indians have developed advanced full-year calendars ,basing them on systematic astronomical observation