(单选题)
______ they have done lots of charities, there is still much waiting to be helped.
A.Only
B.Though
C.Unless
D.Since
参考答案:B
参考解析:
考查though引导的让步状语从句。句意:虽然他们做了很多慈善事业,但仍有很多事情需要帮助。Only意为“仅仅”;Though意为“虽然,尽管”;Unless意为“除非”;Since意为“自从,因为”。根据句意可知,前后句是转折关系。故选B。
知识点:
