Which Sentence Has the Same Meaning

Rewrite the sentence in the same meaning:

1) Perhaps Susan know the address. (may)

--> Susan .......................................................................................

Rewrite the sentence in the same meaning:

2) It's possible that Joanna didn't receive my message. (might)

--> Joanna ....................................................................................

Rewrite the sentence in the same meaning:

3) The report must be on my desk tomorrow. (has)

--> The report ..............................................................................

Rewrite the sentence in the same meaning:

4) I managed to finish all my work. (able)

--> I .................................................................................................

Rewrite the sentence in the same meaning:

5) It was not necessary for Nancy to clean the flat. (didn't)

--> Nancy .......................................................................................

Rewrite the sentence in the same meaning:

6) The best thing for you to do is to sit down sit down. (better)

--> You ...........................................................................................