Answer to #5 should be "solved"

Answer to #2 is debatable.

"Normal" can be used as a noun;therefore, also fits in the sentence.“Go/come back to normal”is acceptable.

所有跟帖： 

• 謝shark指出，我在帖子裏更正了。 -祤湫霖- ♀ (55 bytes) () 05/22/2012 postreply 17:55:12

• If "normal" is OK too, then I got all right -同學小薇- ♀ (0 bytes) () 05/22/2012 postreply 19:15:34

• Yeah, I think so. -祤湫霖- ♀ (0 bytes) () 05/22/2012 postreply 19:29:26