【题目】_______ difficult the task may be, we must finish it on time, because we can’t meet such a precious opportunity _______ we have expected.
A. Whatever; that B. However; as
C. However; that D. Whatever; which
在线课程【答案】B
【解析】
考查让步状语从句和定语从句。difficult是形容词，应该用副词修饰，排除A、D；such...as是固定搭配。故选B.