—These days,he has stayed up late into night in order to get good marks in the following monthly test.—It's no ________ that he seems tired and asleep in class every day.
The effect a teacher has _______ children may be greater than that of their parents.
—Everyone in my class passed the exam. —Oh, really? It ________ difficult.
I ran across David while walking along the street yesterday. I ________ him for three years.
—You are required by law _______ seat belts. —Thanks for your reminding. I’ll do it right away.
______ such a heavy loss in the earthquake, they got help from all over the world.