we to these immediate crises abroad, we also will not let up in our effort to deal with the pressing, ongoing challenges facing our country.
A. With; will respond
B. As; respond
C. As; answer
D. with; will answer
网友回答
A. With; will respond
B. As; respond
(答案→)C. As; answer
D. with; will answer
解析：考查状语从句和固定搭配。With是介词，后加doing，排除A、D；As“尽管，因为，随着”，可引导从句。句意“尽管我们在国外负责处理紧急危机，但我们也不会停止作出努力来处理祖国面临的持续的挑战。”answer to“适应；符合；承担责任”；let up“停止；放松；减少”。故选C。