__________hehaslimitedtechnicalknowledge
单项选择题 __________he has limited technical knowledge, the old worker has a lot of experience.
A.Although
B.Unless
C.As
D.Since
正确答案：A
答案解析:本题考查让步状语从句。句意：虽然这位老工人在技术方面的知识有限，但是他有丰富的经验。although引导让步状语从句，意为“虽然，尽管”。
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