1) —Is this course rather difficult? —Yes. That’s why I ____ it.
A．left B． missed C． abandoned D． abolish
2) The apartment caught fire last night. Fortunately, most of the people there _______ escape.
A. could B. tried to C. meant to D. were able to
3) Slavery was _________ in the U.S. in the 19th century, and slaves were given equal rights.
A. absorbed B. abused C. abolished D. adopted
