Since the beginning of the year, the community medical clinic verified rigorously the potency of each flu vaccine sample, lest any of its patients are vulnerable to the flu.
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Averified rigorously the potency of each flu vaccine sample, lest any of its patients are
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Brigorously verified the potency of each flu vaccine sample, lest any of its patients would be
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Cis rigorously verifying the potency of each flu vaccine sample, lest any of its patients not be
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Drigorously has verified the potency of each flu vaccine sample, lest any of its patients are
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Ehas verified rigorously the potency of each flu vaccine sample, lest any of its patients be
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正确答案: E