1、meantime, travelled to Calais. No one noticed the boy as he crept off. From there,he hitch-hiked to Pxplosives areused, vibrations will cause the roof of the mine to collapse. Rescue workers aretherefore drilling a hole on the north side of the mine. They intend to bring the men up in aspecial capsu2、le. Ifthere had not beena hard layer of rock beneath the soil, they would have completed the job in a fewhours. As it is, they have been drilling for sixteen hours and they still have along way to go. Meanwhile, a microphone, which was lowered into the mine two hours ago, hasenabled the men to keep 3、in touch with the closest relatives. Though they arerunning out offood and drink, the men arecheerful and confident that they will get out soon. They have been told that rescueoperations areprogressing smoothly. Ifthey knew how difficult it was to drill through the hard rock, they would lose heart.Lesson89 A slip ofthe tongue口误口误People will do anything to see afree show-evenif it is abad one. When