请改写下面的句子,以使句子更为简洁 A)Many unskilled workers without training in a particular job are unemployed and do not have any work. B) Do not try to predict those future events that will completely revolutionize society because past history shows that it is the final outcome of minor events that unexpectedly surprise us more. C) The tunnel, which was drilled for twenty-three miles, runs through a bed of solid chalk under the English Channel. D) The drillers made slow advancement, and costs were over 45 million a day. The slow progress was worrisome for some backers. E) There are more than half a million shareholders who have invested in the tunnel. It is they and the banks that expect to profit. F) The necessity for individuals to become separate entities in their own right may impel children to engage in open rebelliousness against parental authority or against sibling influence, with resultant confusion of those being rebelled against. G) The weekly social gatherings stimulate networking among themselves of management from various divisions, with the aim of developing contacts and maximizing the flow of creative information.