摘要： difficulty→ difficult
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The question is very_____ .
[ ]
A. difficult
B. difficulty
C. difficulties
D. not difficult
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B. difficulty
C. difficulties
D. not difficult
It is _______ for them _______ the problem.
A. difficult; to deal with
B. difficulty; dealing with
C. difficult; dealing with
A. difficult; to deal with
B. difficulty; dealing with
C. difficult; dealing with