题目内容
---I don’t think I can work_____ the math problem.
---Think hard, and you can come up _____ the answer.
A. on; to B. out; with C. at; with D. on; for
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题目内容
---I don’t think I can work_____ the math problem.
---Think hard, and you can come up _____ the answer.
A. on; to B. out; with C. at; with D. on; for