WHEN THE BOULDERS AR E M A DE OF ROCK THAT IS...

47. - De thi trac nghiem TOEIC tong hop
De thi trac nghiem TOEIC tong hop
47. When the boulders ar e m a de of rock that is different from the bedrock wh i c h t h e y or the soil of theA B Cfield rests, they ar e ca ll e d erratics.D