49. (2018武汉)—Who is that lady?
—She's Miss Green. She ________ us music, and she is so good.
A. taught  B. teaches  C. will teach   D. is teaching
49. B【解析】考查一般现在时。句意“那位女士是谁？”“她是格林小姐。她教我们音乐，而且人很好。”根据答语的后半句“and she is so good”可知用一般现在时，故选B。