单选题 ______ I admit that the problems are difficult, I don't agree that they cannot be solved.
【正确答案】 C
【答案解析】尽管我承认这些问题有些棘手，但我不同意它们是无法解决的。While作“尽管”讲，相当于although，可以引导让步状语从句，例如：While I admit his good points，I can see his bad ones．虽然我承认他的优点，但我也能看到他的缺点。