I cannot______ puzzled, for I simply cannot understand how I could have made such a stupid mistake

Try to buy one before all the tickets _______.

scot Haibao, full of meanings from foot to head,has become the lucky symbol and cultural _________ of Shanghai Expo.

Are you two old acquaintances? —Yes, we _____ in the same neighborhood for quite a long time, though he went abroad with his family at 14

I’m so hungry. Can I have ________ to eat —Sorry. There isn’t ________ left in the fridge.