I admit that there are problems I don’t agree that they can’t be solved.A. WhenB. AsC. W

问题补充：

I admit that there are problems, I don’t agree that they can’t be solved.

A. When

B. As

C. While

D. But

答案：

A. When

B. As

(答案→)C. While

D. But

解析：“尽管我承认有问题但我不同意解决不了。”A．When 当...时候，既然 B．As因为 C．While虽然 D．But但是，答案C。