Question

—Is that your grandpa ?—Yes, although he is very old ______ he works very hard.

A. and B. but C. / D. so

 

Answer 1

C

【解析】

试题分析：句意:--那是你爷爷吗?—是的，尽管他老了，他工作仍很卖力。although引导的从句不能与but, however连用，但可与yet, still连用。And表递进并列关系；so表因果，二者都不和语境，故选C.

考点：考查连词。