The task is to insert the missing prepositions in the sentences based on the image. The sentences are provided in English with numbered blanks. The Russian text above suggests looking at the picture and inserting the necessary prepositions.

Resolution:

• 1. There's a table on the two chairs. (The table is positioned on top of the chairs).
• 2. ... the table. There's a chair behind the table. (The chair is located at the back of the table).
• 3. ... the bookcase. There's a chair next to the bookcase. (The chair is situated beside the bookcase).
• 4. There are some books in the bookcase. (The books are contained within the bookcase).
• 5. ... the piano. There's a lamp on the piano. (The lamp is placed on the surface of the piano).
• 6. ... the piano. There's a plant next to the piano. (The plant is situated beside the piano).

Answer: 1. on, 2. behind, 3. next to, 4. in, 5. on, 6. next to