A: When did the Shanghai Expo open? B: ___________ May 1st, 2010.
— ______ are your parents? — They’re very well. Thanks.
When I opened the fridge, there ______ only some eggs and a bottle of milk.
— Did you meet ______ interesting at the party? — Not really.
I like this room. You ______ see the mountains from the window.
Which book is ______ to understand, this one or that one?