When ___ the National Treasures Exhibition ____ to the publi

When ___ the National Treasures Exhibition ____ to the public?
A.is,open B.does,open C.will,be open D.did,opened
The cheese cake tasted so ____ that the kids asked for more.
A.delicious B.well C.bad D.badly
We ordered the dishes ____ we got seated.
A.before B.as soon as C.while D.although
The newly built housing estates (are located) in the north of Shanghai.The underlined part means ____
A.lie B.lying c.lay D.stand