The team investigated Kennedy assassination by combining the______ with some historical records never seen by the public before.
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In such episodes as the Red Baron, the show has been heavily relying on ______.
The price of these merchandise in the mall (人几美元到几千美元).
After a subject is set, it is up to history experts to provide us a fully interpretation of the relevant ______.
________________ (村民刚被撤离) when their houses were swept away by the flood.