The little daughter has an __________ (想象的) friend, which is hard to believe for adults.
Fishermen sailors sometimes __________ __________ __________ __________ __________ in the sea. (声称见过怪物)
All polluted water __________ __________ __________ that chemical factory. (和……有关)
I don't believe these reports of UFO s .
There is no proof that people e in outer space.
These animals d mysteriously millions of years ago.