We have achieved great progress.______,we are confident that the work will be completed on time.
问题描述：
We have achieved great progress.______,we are confident that the work will be completed on time.
A.However B.Meanwhile C.Therefore D.Otherwise
答
选C
释义：我们已经取得了重大进步,所以,我们有信心能够按时完成工作.
前后两个句子之间的关系是因果关系,四个选项中只有 “therefore,所以”是表示原因的.