55. I have never seen a more beautiful dress than this one.
→It's......
56. These sunglasses are cheaper than those sunglasses.
→ Those sunglasses are........
57. I was doing my homework. My computer crashed.
→When.......
58. I will finish the book. Then, I will lend it to you.
→When.....
59. The sofa is less comfortable than the chair
→ The chair.....
60. Diana is the most intelligent woman I have ever met.
→I have never .....