Tom caught several fish after three hours, and only then ______ that the secret of success was patience.
A.he realized | B.did he realize |
C.he had realized | D.had he realized |
推荐套卷
Tom caught several fish after three hours, and only then ______ that the secret of success was patience.
A.he realized | B.did he realize |
C.he had realized | D.had he realized |