单选题
It is not long since conditions in the mines were worse than they are now. There are still 61 a few very old women who in their youth have worked 62 , with harness round their waists, and a chain 63 passed between their legs, crawling on all 64 and dragging tugs of coal. They used to go on 65 this even when they were pregnant. And 66 now, if coal could not be produced without pregnant women dragging it 67 and fro, I fancy we should let them do it 68 than deprive ourselves of coal. But most of the time, of course, we should 69 to forget that they were doing it. It is the 70 with all types of manual work; it keeps us alive, and we are oblivious of its existence. More than anything 71 perhaps, the miner can stand as the type of manual worker, not only because it is so vitally necessary and 72 so 73 that we are capable 74 forgetting it as we forget the blood in our veins. In 75 way it is even humiliating to watch coal-miners working. It raises in you a momentary doubt 76 your own status as an "intellectual" and a superior person generally. For it is brought 77 to you, at least while you are watching, that it is only 78 miners sweat their guts out 79 superior persons can 80 superior.