Not until I read your letter ________ th
题型:选择题
问题:
Not until I read your letter ________ the true state of the affairs.
A.did I understand
B.had I understood
C.I understood
D.I had understood
Not until I read your letter ________ the true state of the affairs.
A.did I understand
B.had I understood
C.I understood
D.I had understood