sales of computers have greatly increased since the beginning of the new century,when people ___enjoy the advantages of the ne technology.A begin B began C have begun D had begun the answer is B,why

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sales of computers have greatly increased since the beginning of the new century,when people ___enjoy the advantages of the ne technology.A begin B began C have begun D had begun the answer is B,why

sales of computers have greatly increased since the beginning of the new century,when people ___enjoy the advantages of the ne technology.A begin B began C have begun D had begun the answer is B,why
sales of computers have greatly increased since the beginning of the new century,when people ___enjoy the advantages of the ne technology.
A begin B began C have begun D had begun
the answer is B,why

sales of computers have greatly increased since the beginning of the new century,when people ___enjoy the advantages of the ne technology.A begin B began C have begun D had begun the answer is B,why
the beginning of the new century belongs to past tense.
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