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.
A. intriguing
B. shiny
C. puzzling
D. aggressive
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On 27 March, WhO recommended additional measures ______ preventing the travel-related spread of SARS.
A. going with
B. leading to
C. resulting from
D. aiming at
The smell of cigarette smoke ______ what he had suspected: there had been a party in his absence.
A. confirmed
B. insured
C. supplemented
D. claimed
There are countless stars in the sky and many of them are too small to be seen with the ______ eye.
A. naked
B. alleged
C. complicated
D. disguised
In general , he is a person that you can ______ in case of emergency.
A. count on
B. refer to
C. hold at bay
D. hook up to