A. I was reading a book.
B. I read a book.
C. I will read a book.
D. I am reading a book.
Answer: I was reading a book.
A. I was reading a book.
B. I read a book.
C. I will read a book.
D. I am reading a book.
Answer: I was reading a book.
Additional Information: The past continuous tense describes an ongoing action that was happening at a certain time in the past.
Subjects: Verbs, Parts of Speech