Answer:
1. The Boston Marathon is an annual 26-mile race.
2. Many runners come from all over the world to this event.
3. The race begins in a suburb of Boston.
4. The course takes runners around the Massachusetts countryside.
5. The night before the race, many runners eat pasta dinners.
6. These carbohydrates give the runners energy and stamina.
7. During the race, many runners hit "the wall" after 20 miles.
8. Some racers are stopped by this phenomenon.
9. Approximately 6,000 people enter the competition each year.
10. Despite the tension and exhaustion, many contestants return again and...
Step-by-step explanation:
I have underlined the simple subjects and bolded the simple predicates within the given sentences.
A simple subject is the most important word within the complete subject. It's a noun or a pronoun. For example, the complete subject in the 2nd sentence is Many runners, but the most important word within it is runners, which makes it the simple subject.
A simple predicate is the main part, a verb, of the complete predicate. A complete predicate includes all the descriptors besides the verb (e.g. The race begins in a suburb of Boston), but the simple predicate is just the verb (begins).