Horses and ships were two methods of travel used.
The answer to the first unknown is "POCKET" while in the second unknown is "CANNOT". Hence, in order for us to complete the statement in the problem we have it, a POCKET veto can occur when the president has presented a bill during the last ten days of a legislative session and CANNOT be overridden by a two-thirds vote in both the house of Congress.
Please give me the answer choices and I will gladly take the time to help you.