Answer:
1. The Boston <u>Marathon</u> is an annual 26-mile race.
2. Many <u>runners</u> come from all over the world to this event.
3. The <u>race</u> begins in a suburb of Boston.
4. The <u>course</u> takes runners around the Massachusetts countryside.
5. The night before the race, many <u>runners</u> eat pasta dinners.
6. These <u>carbohydrates</u> give the runners energy and stamina.
7. During the race, many <u>runners </u>hit "the wall" after 20 miles.
8. Some <u>racers</u> are stopped by this phenomenon.
9. Approximately 6,000 <u>people</u> enter the competition each year.
10. Despite the tension and exhaustion, many <u>contestants </u>return again and...
Explanation:
I have <u>underlined</u> 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 <em>Many runners</em>, but the most important word within it is <em>runners</em>, 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 <u>race</u> begins in a suburb of Boston), but the simple predicate is just the verb (begins).