1. Give your mother the keys, she needs them to open the house.
a) Run-on sentence
b) Correct

2. She loves to watch soccer, but she does not like to play.
a) Run-on sentence
b) Correct

3. I have never been to Cuba, I hear it is really nice.
a) Run-on sentence
b) Correct

4. They brought ice cream and a cake with your name written on it.
a) Run-on sentence
b) Correct

5. My co-worker arrives early every morning, so she normally leaves early as well.
a) Run-on sentence
b) Correct

6. You must bring your passport any time you fly on an airplane.
a) Run-on sentence
b) Correct

7. The books in the class are old, but they are still very useful.
a) Run-on sentence
b) Correct

8. Yesterday it rained for many hours, it stopped raining later in the day.
a) Run-on sentence
b) Correct

9. You should try the new restaurant downtown, it is very popular.
a) Run-on sentence
b) Correct

10. Most people I know do not vote in elections, but many people vote in every election.
a) Run-on sentence
b) Correct