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what should we do to fight A/H1N1 flu we should wash hands o

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what should we do to fight A/H1N1 flu we should wash hands often
,avoid ———to crowded places and so on.
A go ,B going Cgone D,to go
what should we do to fight A/H1N1 flu we should wash hands o
选B
考察的是固定搭配,avoid doing something,