difficulty we meet with we must finish it on time because the opportunity is valuableA

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。