It's not necessary to explain the truth _____ there is spring wind, there is green grass.
I often played truant then. How I wish I ______ the time on my study!
To our great joy, his health has improved ______.
She likes to have everything in order so that she can ______ them when necessary.
Only when you ______ what you have learned to practice ______ say you have made it.
After the meeting, she invited us to dinner at her home and treated us ______ delicious food.