请教GWD7-Q32

A surge
in new home sales and a drop in weekly unemployment claims suggest that the
economy might not be as weak as some analysts previously thought.

        
1. claims suggest that the economy might not be as
        weak as some analysts previously thought

        
2. claims
        suggests that the economy might not be so weak as some analysts have
        previously thought

        
3. claims
        suggest that the economy might not be as weak as have been previously
        thought by some analysts

        
4. claims,
        suggesting about the economy that it might not be so weak as previously thought
        by some analysts

        
5. claims,
        suggesting the economy might not be as weak as previously thought to be by
        some analysts

A.claims suggest that the economy might not be as weak as some analysts previously thought
    

B.claims suggests that the economy might not be so weak as some analysts have previously thought
    

肯定句否定句都可以用 so/as.....as .     A是对的，B中 时态是不对的，用过去时态就好。