问题
选择题
________ he has limited technical knowledge, the old worker has a lot of experience.
A．Since
B．Unless
C．As
D．Although
答案
答案：D
空格处应引导让步状语从句，填入although最为合适。
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________ he has limited technical knowledge, the old worker has a lot of experience.
A．Since
B．Unless
C．As
D．Although
答案：D
空格处应引导让步状语从句，填入although最为合适。