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题目内容
（河北工程技术学院大学英语1）
19、(单选、2.5分)
It is not easy __________the answer to the difficult math problem.
A、to figure out
B、figuring out
C、figure out
D、being figured out
It is not easy __________the answer to the difficult math problem.
A、to figure out
B、figuring out
C、figure out
D、being figured out
参考答案