Вставьте нужную форму глагола to be: 1) -(am/ is/are) there a bookcase in her room? -yes, 2) there (am/ is/are) a clock in the dining-room. 3) there (am/ is/are) no light in the classroom.

1) Is there a bookcase in her room? -Yes, there is.
2) There is a clock in the dining-room.
3) There is no light in the classroom.