题目内容
All our household goods are ______ against accidental damage.
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The last guest didn't ______ till well after midnight.
Even now, World Health Organization (WHO) specialists are not completely sure that the rotavirus(轮状病毒）， which they have identified in patients is the sole cause, and there are many ______ features about the method of transmisssion.
On 27 March, WhO recommended additional measures ______ preventing the travel-related spread of SARS.
The smell of cigarette smoke ______ what he had suspected: there had been a party in his absence.
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