11.   Drought also threatens cereal crops in southern Africa, increasing food import requirements.

n. + threaten >>共 1571
group 3.42%
government 2.46%
official 2.39%
leader 2.31%
rebel 2.08%
union 1.76%
party 1.26%
police 1.24%
man 1.11%
administration 1.08%
drought 0.15%
drought + v. >>共 189
be 17.58%
cause 5.36%
force 4.72%
hit 3.97%
affect 3.64%
continue 3.54%
end 2.79%
have 1.93%
reduce 1.71%
mean 1.61%
threaten 1.18%
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