30. Why is wood an ideal material for building houses and furnitures? It is ______________. A. synthetic B. nonmetallic C. biodegradable D. rigid and tough
D. rigid and tough
26. Which explains why papers are used in writing? A. Papers are soft. B. Papers have the ability to dry up liquids like ink quickly. C. Papers are made of cellulose fibers that have absorbent property. D. Papers
Papers have the ability to dry up liquids like ink quickly.
29. Why are water jugs made of plastics? A. Plastics are rust proof. B. Plastics are strong and absorbent. C. Plastics are shiny and water proof. D. Plastics are good conductors of heat.
C. Plastics are shiny and water proof.
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