Questions 22-25 are based on the following passage. What is the "lead" in a pencil made of.’ A: Diamond. B: Carbon. C: Lead. D: Graphite.

Pencil is to lead as______. () A: pen is to paper B: tube is to straw C: stem is to pith D: graphite is to mineral E: wood is to mill

To lubricate the swivel or remove corrosion from a fire hose coupling，you should use（）. A: glycerine B: graphite C: kerosene D: fresh water and soa

Although<br/>pencils______are<br/>made of graphite and not of lead,the term “lead pencil”has<br/>come to<br/>be widely used. A: supposedly B: still C: everywhere D: genuinely