]The only room visible in the KELLER house is ANNIE’S, where by lamplight ANNIE in a shawl is at a desk writing a letter; at her bureau HELEN in her customary unkempt state is tucking her doll in the bottom drawer as a cradle, the contents of which she has dumped out, creating as usual a fine disorder. —The Miracle Worker, William Gibson Based on the stage directions, where does this scene in the play take place? in Annie’s room at the Perkins Institute for the Blind in Annie’s room in the Keller residence in a classroom at the Perkins School for the Blind in Annie’s room at a hotel near the Keller home

I believe the answer is B) In Annie's room in the Keller residence :D

the present continuous is a verb tense which is mainly used to indicates that an action is in progress at the moment of speaking.  

it is formed using: person + verb to be (am/is/are) +verb + - ing form  

example: i am studying at this moment .

in addition, the present continuous is also used in order to express things that will or will not happen in the near future.

example: i am having dinner with some friends tonight.

the speaker sometimes   uses it   to express that an action is repeated and it causes irritation on the part of the speaker

example: my sister is constantly complaining about everything.