问题补充:
difficulty we meet with, we must finish it on time, because the opportunity is valuable.
A. Whatever; such
B. However; such
C. However; so
D. Whatever, that
答案:
A. Whatever; such
B. However; such
C. However; so
(答案→)D. Whatever, that
解析:此题前半句是让步状语从句, difficulty 为名词故用Whatever,因为 However 后跟形容词或副词。第二个空填that ,that 为副词,那么,用法相当于so。valuable 为形容词不能用 such修饰,因此答案选D。