—What is the man, do you know?-— I don’t know exactly． But I think he can be ______ but a teacher．

—Which of these two sports sweaters will you take? —I’ll take            . I will choose another one.

---I’m too busy, could you do _______ to help me?--- Of course. I can do _______ for you if you want me to.

A table made of steel costs more than ____ made of wood.

The zoologist is telling the visitors how a horse’s vision differs from ______ of a human.