7. Underline the correct option.
a. Although / Besides Ralph didn't study for the test, he got good grades.
b. You can borrow my book provided that / owing to you give it back tomorrow.
c. Besides / Owing to heavy traffic, Elaine was late to work.
d. Smoking causes health problems. However / Besides, it's expensive.
e. Ally is a great driver. However / Although, she prefers taking the bus to work.