某建设项目，在施工设计图纸尚未完成之时，业主通过招标选择了一家总承包单位承包该工程的施工任务。承包范围内待实施的工程虽性质已明确，但工程量难以确定，双方商定拟采用总价合同形式签订施工合同，以减少双方的风险。施工合同签订前，业主委托了一家监理单位拟协助业主签订施工合同和进行施工阶段监理。监理工程师查看了业主(甲方)和施工单位(乙方)草拟的施工合同条件，发现合同中有以下一些条款：
1．乙方按监理工程师批准的施工组织设计(或施工方案)组织施工，乙方不应承担由此引起的工期延误和费用增加的责任。
2．甲方向乙方提供施工场地的工程地质和地下主要管网线路资料，供乙方参考使用。
3．乙方不能将工程转包，但允许分包，也允许分包单位将分包的工程再次分包给其他施工单位。
4．监理工程师应当对乙方提交的施工组织设计进行审批或提出修改意见。
5．无论监理工程师是否参加隐蔽工程的验收，当其提出对已经隐蔽的工程重新检验的要求时，乙方应按要求进行剥露，并在检验合格后重新进行覆盖或者修复。检验如果合格，甲方承担由此发生的经济支出，赔偿乙方的损失并相应顺延工期。检验如果不合格，乙方则应承担发生的费用，工期不应顺延。
6．乙方按协议条款约定时间应向监理工程师提交实际完成工程量的报告。监理工程师在接到报告3天内按乙方提供的实际完成的工程量报告核实工程量(计量)，并在计量24小时前通知乙方。
[问题]
In the days of Samuel Clemens, better known as Mark Twain, life on a steamboat on the Mississippi River was (21) One of the most exciting (22) of that period was a race (23) two of the fastest river boats.
The Natchez had steamed up the river from New Orleans to St. Louis in three days, twenty-one hours, and fifty-eight minutes. John Cannon, (24) of the Robert E. Lee felt sure that he could (25) this time and challenged the captain of the Natchez. (26) his boat light, Captain Cannon (27) no passengers (28) ; he did not (29) the usual goods. Moreover, he had crews with supplies of coal waiting on floats along the river so that the boat would not have to put it to shore for (30) . The race began on June 30,1870. Being lighter than the Natchez, the Lee jumped into an early lead. For three days the race continued, (31) the boats traveling at full steam. They were (32) eac
A. rode
B. drove
C. took
D. brought
Music comes in many forms; most countries have a style of their own. (21) the turn of the century when jazz (爵士乐) was born, America had no prominent (22) of its own. No one knows exactly when jazz was (23) , or by whom. But it began to be (24) in the early 1900s. Jazz is America’s contribution to (25) music. In contrast to classical music, which (26) formal European traditions. Jazz is spontaneous and free-form. It bubbles with energy, 27 moods, interests, and emotions of the people. In the 1920s, jazz (28) like America. And (29) it does today.
The (30) of this music are as interesting as the music (31) , American Negroes, or blacks, as they are called today were the Jazz (32) . They were brought to the Southern states (33) slaves. They were sold to plantation owners and forced to work long (34) . When a Negro died, his friends and relatives (35) a procession t
A. expressing
B. explaining
C. exposing
D. illustrating
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