A、In his opinion, they are possible.
B、He does not believe them.
C、He has used this as an important fact to praise ancient civilization.
D、In his opinion, ancient explorers did not have the skills necessary for long
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A、In his opinion, they are possible.
B、He does not believe them.
C、He has used this as an important fact to praise ancient civilization.
D、In his opinion, ancient explorers did not have the skills necessary for long