вопросы правда или ложь

Ответ от Nadya F[гуру]
"Penguins can swim" he said--He said penguins could/can swim
The earth is flat,the old man said-The old man said the earth was flat
the cheetah is the fastest animal in the world he said-He said the chitah was/is the fastest animal in the world
a train goes faster than a plane he said -He said a train went faster than a plane
Dolphins are less intelligent than sharks he said -He said dolphins were/are less intelligent than sharks
Men does not live forever she said She said men didn't/don't live forever
Время может меняться или оставаться без изменения в косвенной речи, когда речь идет об общеизвестной истине, законе природы