Question

【题目】 ___________his technical knowledge was limited, the old worker has a lot of experience.

A. Since B. Unless C. As D. Although

Answer 1

【答案】D

【解析】考查连词的用法。句意：虽然他的技术知识有限，但这位老工人有很多的(工作)经验。since＂既然＂；unless＂除非＂；as＂当……时，因为＂；although＂尽管……，但是……＂，引导让步状语从句。故选D。