Which sentence contains a progressive verb?
a.
my parents will be arriving home from work soon.
b.
jenna takes her dog on long walks every afternoon.
c.
i spent all my savings on a new baseball glove.
d.
my parents have hidden my younger brother's birthday presents in the attic.

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.