单选题 ______ I sympathize, I can't really do very much to help them out of the difficulties.
A. As long as B. As C. While D. Even

【正确答案】 C

【答案解析】[解析] 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，但我也能看得出他的缺点。While we don't agree，we continue to be good friends．虽然我们意见不符，但我们仍然是好朋友。