Theory:

     Next day, while I was sitting in the dining-room wondering whether I should take some fruit from the table without my parents’ permission, a long, black thing, very much like a snake, suddenly came through the window and disappeared with all the bananas. I was very much frightened because I had never seen snakes eat bananas and I thought it must be a terrible snake that would sneak in and take fruit. I crept out of the room and with great fear in my heart ran out of the house, feeling sure that the snake would come back into the house, eat all the fruit and kill all of us.
Explanation:
 
The next day, the narrator was sitting in his dining-room and thinking about whether he could take some fruit from the table without his parent's permission. Suddenly, a black thing, which looked like a snake, appeared through the window and soon disappeared with all the bananas.
 
shutterstock_57602641.jpg
Kari's trunk looks like a snake
 
The narrator came out of the house with great fear and thought that it must be a terrible snake. He felt that the snake would come inside the house and kill all of them.
 
Meanings of the difficult words:
 
S.No
Words
Meanings
1
Similar Same
2
TerribleVery unpleasant; causing great shock or injury
3
WonderingWant to know something; to ask yourself questions about something
Reference:
National Council of Educational Research and Training (2007). Bringing up Kari- Dhan Gopal Mukherji(7-14). Published at the Publication Division by the Secretary, National Council of Educational Research and Training, Sri Aurobindo Marg, New Delhi.