单项选择题

A．finding the subgroup of the virusB．developing a cureC……

The doctor in Singapore performed a valuable service by ______.

A．finding the subgroup of the virus
B．developing a cure
C．keeping his patients apart from others
D．reporting the outbreak to W. H. O.

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热门试题

单项选择题The type of influenza discussed in this story ______.

A．had been classified years before
B．could not be cured by any known drug
C．could be prevented from spreading
D．could not affect adults

单项选择题One interesting thing about the virus in the story was that it ______.

A．was especially weak
B．was similar to other viruses
C．could reproduce at great speed
D．had samples frozen and packed in dry ice

单项选择题A．haven'tB．wasn'tC．don'tD．didn't I

A．haven't
B．wasn't
C．don't
D．didn't I

单项选择题A．so will the time beB．the mine will be, tooC．so will mineD．mine will be, too

A．so will the time be
B．the mine will be, too
C．so will mine
D．mine will be, too

单项选择题A．runningB．runsC．is runningD．was running

A．running
B．runs
C．is running
D．was running