高等继续教育 / 旅游英语
正确率：100%
题型描述: 单选题
7.It is not easy＿＿＿＿＿＿＿＿＿＿the answer to the difficult math problem.
A.to figure out
B.being figured out
C.figuring out
D.figure out
7.It is not easy＿＿＿＿＿＿＿＿＿＿the answer to the difficult math problem.
A.to figure out
B.being figured out
C.figuring out
D.figure out
参考答案：
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