Help! Which sentence is correct? and why? Thank you!

[Harry12345]

Which sentence is correct? Thank you!

1 The question is so difficult that few of us can do.
2 The question is so difficult that few of us can do it
3 The question is too difficult for anyone of us to do.
4 The question is too difficult for anyone of us to do it.

 

[ha179]

Not a teacher.

Which sentence is correct? Thank you!

1 The question is so difficult that few of us can do.
2 The question is so difficult that few of us can do it
3 The question is too difficult for anyone of us to do.
4 The question is too difficult for anyone of us to do it.

I think the first and third sentences are correct because "the question" is the subject that links two parts of these sentences, so you don't need to repeat it but the readers can still understand what you mean.

 

[corum]

1 The question is so difficult that few of us can do. :cross:
2 The question is so difficult that few of us can do it :cross:
3 The question is too difficult for anyone of us to do. :cross:
4 The question is too difficult for anyone of us to do it. :cross:

"to do a question" is not a collocation. What does do in #1 stand for? Is it a code, a manifestation of one of the NICE properties of auxiliaries? Incorrectly applied. What are you trying to say?

 

[ha179]

Not a teacher.
Maybe "to do" here means "to find the answer to sth; to solve sth", so I think it can go with "the question"

 

[bhaisahab]

Which sentence is correct? Thank you!

1 The question is so difficult that few of us can do.
2 The question is so difficult that few of us can do it
3 The question is too difficult for anyone of us to do.
4 The question is too difficult for anyone of us to do it.

#2 is correct, but it might be better with "answer" rather than "do".

 

[ha179]

#2 is correct, but it might be better with "answer" rather than "do".

Please explain to me why #3 is incorrect, thank you!

 

[Harry12345]

How about changing question into excise？

1 The exercise is so difficult that few of us can do.
2 The exercise is so difficult that few of us can do it
3 The exercise is too difficult for anyone of us to do.
4 The exercise is too difficult for anyone of us to do it.

 

[bhaisahab]

Please explain to me why #3 is incorrect, thank you!

#3 would be correct with "any" instead of "anyone".

 

[bhaisahab]

How about changing question into excise？

1 The exercise is so difficult that few of us can do.
2 The exercise is so difficult that few of us can do it
3 The exercise is too difficult for anyone of us to do.
4 The exercise is too difficult for anyone of us to do it.

#2 is correct.

 

[Harry12345]

Thank you Mr bhaisahab

You tell us 3 would be correct with "any" instead of "anyone", and 2 is correct.

2The exercise is so difficult that few of us can do it
3 The exercise is too difficult for any of us to do.

Could you please tell me why there is it in 2 but there isn’t it in 3[FONT=&#23435]？[/FONT]