问题
选择题
Have they come up ______ the solution ______ the problem? [ ]
A. with, of
B. of, of
C. to, of
D. with, to
答案
答案：D
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Have they come up ______ the solution ______ the problem? [ ]
A. with, of
B. of, of
C. to, of
D. with, to
答案：D