The Internet celebrated its birthday on September 2nd, by which time 40 years _______ since the first successful transfer of data between two computers.
A.has passed | B.had passed | C.passed | D.have passed |
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The Internet celebrated its birthday on September 2nd, by which time 40 years _______ since the first successful transfer of data between two computers.
A.has passed | B.had passed | C.passed | D.have passed |