“Rubber Duck”,________ by Dutch artist Florentijn Hofman，has visited many cities since 2007．

— How do you find the town you visited yesterday?— The town has changed out of all ______ in the past 20 years, a completely new one in front of me. 

Ten minutes later，a bus________and everybody got on it.

In that big fire all their houses were______, so they had to build new ones. 

Malaysia Airlines Flight MH370 seemed to have been ______ to only a mystery after so long and hopeless a search．