单选题
Which of the following is correct?
A、
The thirty-foot-long pipe was not a straight one.
B、
There were no big bends in the solid stone.
C、
Solid stone had to be put into the pipe.
D、
In one place the workmen had to put big bends into some new wiring.
【正确答案】
A
【答案解析】
[解析] 文章第二段第三句话意为：这个，在一个地方我们必须把一些电线穿过一根30英尺长、1英寸宽的管道，管道建在石头内并有4个大弯曲。由此可以推断出管道是弯曲的。故本题答案为A。
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