____ deep down in the earth，the dead forests rotted away and became coal.

中国大学MOOC: In Chapter 7, The Red Badge of Courage, Henry meets a rotted corpse in the forest.

中国大学MOOC: _______ deep down in the earth for thousands of years, the dead forest has rotted away and become coal.

He ______ the mud with a stick, looking for the ring he had dropped. A: probed B: poked C: raided D: rotted

_______ deep down in the earth for thousands of years, the dead forest has rotted away and become coal. A: Buried B: Burying C: Having buried D: Having been buried

( )deep down in the earth or thousands of years ,the dead ore g has rotted<br/>away<br/>and become coal. A: Buried B: Burying C: Having<br/>buried D: Having<br/>been buried