What will happen if you put a buzzard in a pen (围栏) which is six to eight feet square and entirely open at the top? The bird in spite of its ability to fly, will be an absolute __1__. The reason is that a buzzard always begins a(an) __2__, from the ground with a run of ten to twelve feet. Without enough __3__ to run, as is its habit, it will not even __4__ to fly, but remain a prisoner for life in such a small jail with no top.
