She ________a German. She has _______him for three years.
—You may find the key to the math problem on page 107.—Ah, it's so simple. I wonder why I _____ of that.
Cars do cause people some health problems, in fact far more serious _____ than computers do.
More people are choosing to work _____ retirement age,since the living expenses are shooting up sharply.
On seeing_____ gift they wanted, the kids screamed with _____ delight.
Compared with male graduates, a(n) ______ small number of female graduates can get employed when they go job-hunting.