6. Why did Jessica's father wait until after the last guest left to show her the surprise outside? A: He could not get the projector to work properly until then.
B: He wanted her to have a party as well as to watch the race.
C: He knew her friends did not enjoy racing and would be bored.
D: He knew the race was airing live on the television later that night.

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.