_____ is certain is ______ the mystery of Stonehenge has never been fully explained.

Do you know the result of the ________ race—-Yes. The winner is a boy ________ Lin Feng from Class 4.

_________ are you going to visit——–I am going to visit the PalaceMuseum.

w machine is supposed to bethe solution to all our production problems, but"____"

The old man lives ____ in the big apartment but he doesn’t feel ___ at all