Write the comparative and superlative form of adj in brackets

IV. Write the comparative and superlative form of adj in brackets.
23. Which is _____ , Mount Everest or K2? - Mount Everest. (high)
24. Antarctica is one of _____________ places on earth (cold)
25. Buying things from plastic is ______________than buying things from recyled paper. ( bad)
26.  At present, Son Duong Cave is ____________ cave in Quang Binh province. (famous)
27. This flat is nice, but it's _____________ from the city center than the other one. (far)
28. The boat trip was __________ experience of my life. (good)