Such crimes may be so complex that months or years go by before anyone ______ them.

I ______ writing the paper as scheduled, but my mother’...

单项选择题  I ______ writing the paper as scheduled, but my mother’s illness interfered. I hope you will excuse me.

By the time she is 50 years old, she ______ an inmate o...

单项选择题  By the time she is 50 years old, she ______ an inmate of the prison for over half of her life.