Fishermen sailors sometimes __________ __________ __________ __________ __________ in the sea. (声称见过怪物)
Jack __________(声称)that its head looked like a horse.
There is something __________(神秘的)in what he said.
He stayed under water for two minutes, and then swam to the __________(表面).
The young scientist is __________(怀疑)about the theory.
You are easy to be __________(攻击)when you are in red in the forest.