Question

-- _______ the soldiers are very tried, __ they keep on working.
--They are great. We must learn from them.

A．Because; /

B．Though; /

C．Because; so

D．Though; but

Answer 1

B

考查连词。Because因为；Though虽然，尽管； so因此；but但是；句意：虽然这些士兵很累，但是他们坚持工作。though引导的让步状语从句，不能与but同时出现在一个句子中。故选B。