Read the excerpt from the building of manhattan. it was a monumental task: to design the world's tallest building, create as much usable rental space as possible, plan so it could be built within 18 months, and still have a handsome building. in the end, architect william lamb worked on fifteen designs before his plan "k" was finally chosen. which words cannot be changed when paraphrasing this text? “monumental task” “handsome building” “fifteen designs” “usable rental space”

Walking is not the most exciting form of exercise a person can take on for fitness. yet it is low impact and requires no fancy equipment. that makes walking a simple activity for those new to exercise. walking is less likely than other exercises to cause injury to leg tendons and muscles. all it requires is a good pair of sneakers-no cables, stylish outfits, or weights required. of course, a person could increase the benefit of a workout by adding weights or speed walking. identify the main idea of this paragraph. walking is a difficult and safe exercise for beginners. walking is an easy and safe exercise for beginners. walking is a boring and dangerous form of exercise. walking is an exciting and very effective form of exercise.