成人高考 2022_07_29 每日一练
He explained everything over and over again ______anyone should misunderstand him.
A. since
B. when
C. lest
D. as if
2000年5月，甲公司向乙银行贷款6万元，双方订立贷款合同，合同约定由丙公司担任甲公司到期还款的保证人，贷款期限至2005年10月。2004年8月，甲公司因需又向乙银行贷款 4万元，并约定与第一次贷款同期清偿。对于第二次贷款合同，甲、乙均未告知丙公司。2005年 10月，甲公司因无力偿债，乙银行请求丙公司承担保证责任，偿还甲公司所欠10万元贷款。丙公司拒绝，乙公司诉至法院。问：
本案如何处理?为什么?
Passage Five
Roman soldiers in some places built long rows of signal towers. When they had a message to send, the soldiers shouted it from tower to tower. If there were enough towers and enough soldiers with loud voices, important news could be sent quickly over distance.
In Africa, people learned to send messages by beating on a series of large drums (鼓). Each drum was kept within hearing distance of the next one. The drum beats were sent out in a special way that all the drummers understood. Though the messages were simple, they could be sent at great speed for hundreds of miles.
In the eighteenth century, a French engineer found a new way to send short messages. In this way, a person held a flag in each hand and the arms were moved to various positions representing different letters of the alphabet (字母表). It was like spelling out words with flags and arms.
Over a long period of time, people sent messages by all these different ways. However, not until the telephone was invented in America in the nineteenth century could people send speech sounds over a great distance in just a few seconds.
51. According to this passage, the Roman way of communication depended very much on______.
A. fine weather
B. high tower
C. the spelling system
D. arm movements