v. + challenge >>共 460
face 22.02%
meet 6.93%
pose 4.59%
present 4.24%
accept 3.23%
have 2.37%
mount 1.94%
issue 1.72%
survive 1.38%
take 1.31%
face + n. >>共 753
charge 11.01%
problem 3.34%
competition 3.22%
challenge 3.13%
trial 2.93%
opposition 2.38%
pressure 2.10%
criticism 1.52%
life 1.47%
difficulty 1.41%
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