25. Only when I lost the opportunity to take my first job ____ how important it was to me. A. I realized B. I had realized C, had I realized D . did I realize
Leave your key with a neighbor _______ you lock your-self out one day.
I got caught in the rain and my suit _______.
You have failed two tests.You’d better start working harder,_______ you won’t pass the course.
The new group of students is better-behaved than the other group who stayed here _____.
He is a student at Oxford University,_______ for a degree in computer science.