we to these immediate crises abroad we also will not let up in our effort to deal with

问题补充：

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

答案：

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。