38. ____ is one of the activities in the outdoor classroom. (A) Building bird-houses (B) Holding basketball games (C) Having classes in the theater (D) Catching different kinds of birds

44. What’s the difference between volcanic clay and non-volcanic clay? (A) Volcanic clay can be found in very few countries. (B) Non-volcanic clay can be dried more quickly. (C) Non-volcanic clay makes better containers. (D) Volcanic clay usually has more minerals.