help me (sentences with pronouns)?

Here is the first sentence:

Rewrite the sentence to make the pronoun reference clear.

Sally told Sarah that she needed to work on her spelling.

I thought that this would fix it:

Sally told Sarah that she needs to work on her spelling.

My teacher disagrees.

Rewrite the sentence to make the pronoun reference clear.

She traced her ancestry back to the original president of the college, which her roommate thought was unfair.

She traced her ancestry back to the original president of the college. Her roommate thought that was unfair.

Question

help me (sentences with pronouns)?

Here is the first sentence:


Rewrite the sentence to make the pronoun reference clear.

Sally told Sarah that she needed to work on her spelling.

I thought that this would fix it:

Sally told Sarah that she needs to work on her spelling.

My teacher disagrees.

Rewrite the sentence to make the pronoun reference clear.

She traced her ancestry back to the original president of the college, which her roommate thought was unfair.

She traced her ancestry back to the original president of the college. Her roommate thought that was unfair.

anonymous · Answer

Help please?

anonymous · Answer

late reply sorry, but this is the closes i got 

"Sarah's spelling needed to be worked on so Sally told her."

anonymous · Answer

And as for the second one: 

"Her ancestry traced back to the original president of the college, which her roommate though was unfair."  also, are you doing alpha omega academy? (just wondering)