问题: d 16
1 It cuts a clean cylinder of rock, from which CAN BE SEEN the strata the drill has been cutting through.
因为FROM WHICH 的原因所以CAN BE SEEN 前置了，也是倒装。
2 The deepest holes of all are made for oil,and they go down to as much as 25,000 feet. But we do not need to send men down to get the oil out, as we must WITH other mineral deposits.
这里的WITH是IN THE CASE OF：就，，，，，而言，而且WITH前面省略了“send men down to get the oil out”
欢迎大家指点，讨论，谢谢！
解答:
1 It cuts a clean cylinder of rock, from which CAN BE SEEN the strata the drill has been cutting through.
我认为你第一句话的分析正确。整句话相当于
1/It cuts a clean cylinder of rock.
2/the drill has been cutting through the strata.
3/from the clean cylinder of rock can be seen the strata.即 the strata can be seen from the clean cylinder of rock.把from which 提到句首做地点状语时全部倒装。
在岩石上切出了个整齐的圆柱体洞，从那里可以看到钻孔机穿透的各种地层。
2 The deepest holes of all are made for oil,and they go down to as much as 25,000 feet. But we do not need to send men down to get the oil out, as we must WITH other mineral deposits.
我认同你关于第二句话with指代in the case of，但我认为with前省略掉的是send men down,表示as we must send men down to get other mineral deposits.
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