Question

3. A ticket to the theatre is cheaper than I expected (not as .. as)

=> A ticket to the theatre

4. The painting in the museum is not different from the painting in the gallery . (like)

=> The painting in the museum 

Answer 1

3. A ticket to the theatre is cheaper than I expected (not as .. as)

=> A ticket to the theatre is not as expensive as I expected.

4. The painting in the museum is not different from the painting in the gallery . (like)

=> The painting in the museum is like the painting in the gallery.

Answer 2

3 A ticket to the theatre is not as expensive as I expected

4 The painting in the museum is not like the painting in the gallery