One third of the class _____ agreed to be volunteers to help the aged this vocation.
Here are some new computer programs _______ for home buildings.
_______ with the size of the whole earth, the highest mountain does not seem high at all.
_______ a post office, I stopped _______ some stamps.
We’re _______ to listen to her _______ voice. It’s _______ to hear her sing.
.I fell down and broke three of my teeth. I wonder how many times I have to come here and get my false teeth _______.