_____ it is not his responsibility...-环球网校

单选题

第二章第二节：句法

_____ it is not his responsibility to do that,he said he would help.

Although

Since

Unless

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正确答案:A

考查连词词义辨析。句意：尽管做那件事并不是他的职责所在，他仍说他会帮忙。although尽管，虽然，即使，表示让步；as因为，表示原因；since因为，由于，表示原因；unless除非，表示转折。