These walls ___ stone.
举一反三
- Why do pumice stone float on the surface of the water? A: They are<br/>comparatively smaller. B: They contain special <br/>materials. C: They are not real stones. D: There are pores in the stone.
- 1.A feather is ________________(light) a stone.
- There are two walls in eduation. One is visible walls of the builiding seperating the school from real lives; the other is invisible walls between disciplines.
- We were in ____ of being hit by a stone.
- Running in the rain, ______. A: I fell over a stone B: a stone blocked me C: a stone caused me to fall D: I was fallen over a stone