40. In the end of the party, Mary found herself washing the dishes alone again, as usual . A B
C D
IV/. Read the following passage and mark the letter A, B, C, or D to indicate the correct word for
each of the blanks.
BIRD FLU
There has been a(n) …(41)… of avian influenza, better known as bird flu in Asia recently.
The first …(42)… died two weeks ago in Vietnam and there have been cases reported since in
Thailand, and there are some suspected cases in Cambodia …(43)….
Wild birds are affected by a large number of flu viruses, just as humans and other animals
…(44)…, but they are normally exclusive to birds. If the viruses manage to mutate, they can jump
the species barrier and infect human beings. The first case …(45)… someone died was in Hong
Kong in 1997.
There are several different forms of bird flu, raging from mild to very …(46)…
infections, which spread rapidly and kill many of the birds they infect. It is spread by …(47)…
birds-ducks, in particular – which carry the virus, but aren’t killed by it. They can spread the virus
to farm birds through …(48)… contact or by contaminating water supplies.
World Health Organization officials have attributed the spread of bird flu to human contact
with the droppings of infected birds and …(49)… sanitation. There was no evidence at first that
the virus spread from person to person, though there has been a …(50)… of this happening being
investigated by scientists.
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