QUESTION: answer this: many rock and soul acts of the late 1960s first reached a large audience at??

ANS: The Ed Sullivan Show

QUESTION: answer this: what system does the united states use for measurement??

ANS: United States customary units

QUESTION: answer this: who pushed for a canal across central america linking the atlantic ocean and the pacific ocean??

ANS: Ferdinand de Lesseps

QUESTION: answer this: number of cigarettes in a pack in usa??

ANS:
at least 20