Question

________ it was very late, ________ he was still doing some experiments in the lab．

A. Although; butB. Although; yetC. Even though; butD. Though; but

Answer 1

答案B
although/though可以和still、yet连用，但不可以和but连用，所以选择B．本句是一个让步状语从句，而且带有副词．句子的意思是“尽管已经很晚了，他依旧在实验室做实验”．
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