|
Pregunta
|
Respuesta correcta
|
Tikal ................without the help of 2000 people. :
|
could not have been constructed |
The Nazca lines ........................ by aliens :
|
might have been created |
|
Pregunta
|
Respuesta correcta
|
He ................ called by his wife before the meeting :
|
might have been |
Moai figures ...................... by the local people in ancient times. :
|
might have been built |
Scientist are sure that Vredefort crater ....................... by a meteorite. :
|
had to have been caused |
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