____ deep down in the earth，the dead forests rotted away and became coal.
举一反三
- 中国大学MOOC: _______ deep down in the earth for thousands of years, the dead forest has rotted away and become coal.
- _______ 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
- With more forests being destroyed, huge quantities of good earth each year. A: is washing away B: is being washed away C: are washing away D: are being washed away
- The deep earth laboratory in Jinping is meters away from the top of the mountain. A: 2,400 B: 2,200 C: 1,800 D: 8,000