<單選題>
I ______ swimming for several years before I went to this high school. I gave it up because of heavy schoolwork.
(A) have practiced
(B) am practicing
(C) practiced
(D) would practice
答案
I ______ swimming for several years before I went to this high school. I gave it up because of heavy schoolwork.
(A) have practiced
(B) am practicing
(C) practiced
(D) would practice