【填空题】

A Vietnamese(越南的 ) man has just died of bird flu. So far, 19 people ______ (die) because of the disease. A team of experts from Hong Kong has arrived in Vietnam for ______ (meet) with local health officials and the WHO( 世界卫生组织), trying to find out how ______ (stop) the disease.
The experts said 70% of people who have had bird flu in Asia have died. The number is about twice as that in 1997 in Hong Kong. One expert said the bird flu  ______ (seem) to be much more serious than before, and many cities  ______ (affect感染). He also said that it was still not ______ know) why this disease was so serious and why only patients in two countries had died.
He said that in 1997, the bird flu ______ (appear) in Hong Kong, only 6 people were killed. This time, the disease ______  (find) in 11 countries.
Japan has stopped importing( 进口 )chicken from the US because bird flu was found in Delaware. Japan was trying ______ (confirm 证实 )the disease in Delaware. If the disease is not harmful to people, it ______ ( import进口) chicken from the US.